Fix Wi-Fi Problems in OS X Yosemite.pdf

Oct 25, 2014 - 242 Comments

Fix Wi-Fi Problems in OS X Yosemite

Some Mac users who upgraded to OS X Yosemite have discovered a variety of wirelessnetwork connectivity issues, ranging from dropping wi-fi connections, to an inability toconnect to the outside world despite being connected to a wifi router, even suddenly andstrangely slow internet speeds. These network issues seem to occur most often on Macs that

have updated to OS X Yosemite from Mavericks rather than those who performed a clean

Yosemite install, which could suggest the issue has to do with improper network setting andpreferences, or even a corrupted file somewhere. Thats a good thing, because it should meana resolution is fairly easy to implement, as were about to show you.

It should be noted that its difficult topoint to a single cause for sudden andunexpected wireless troubles with anyOS X version, and there may bedifferent causes for different users.Accordingly, its challenging to offer asingle solution to the Yosemite Wi-Fiproblems that users are experiencing.With that said, weve been able toresolve the problem for many Macs byusing the steps outlined below. This

involves editing some system level configuration files, and you should probably start a Time

Machine backup before proceeding just to be on the safe side of things.

1: Remove Network Configuration & Preference FilesManually trashing the network plist files should be your first line of troubleshooting. This is

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one of those tricks that consistently resolves even the most stubborn wireless problems onMacs of nearly any OS X version. This is particularly effective for Macs who updated toYosemite that may have a corrupt or dysfunctional preference file mucking things up:

1. Turn Off Wi-Fi from the Wireless menu item

2. From the OS X Finder, hit Command+Shift+G and enter the following path:

/Library/Preferences/SystemConfiguration/

3. Within this folder locate and select the following files:

com.apple.airport.preferences.plist

com.apple.network.identification.plist

com.apple.wifi.message-tracer.plist

NetworkInterfaces.plist

preferences.plist

4. Move all of these files into a folder on your Desktop called wifi backups or somethingsimilar were backing these up just in case you break something but if you regularlybackup your Mac you can just delete the files instead since you could restore from TimeMachine if need be

5. Reboot the Mac

6. Turn ON WI-Fi from the wireless network menu again

This forces OS X to recreate all network configuration files. This alone may resolve yourproblems, but if youre continuing to have trouble we recommend following through with thesecond step which means using some custom network settings.

2: Create a New Wi-Fi Network Location with Custom DNSWhat were doing here is creating a new network location which is going to have aconfiguration different from the defaults. First, well use a completely new network setup.Then, well set DNS on the computer rather than waiting for OS X to get DNS details from thewi-fi router, which alone can resolve many issues with DNS lookups, since Yosemite seems tobe finicky with some routers. Finally, were going to set a custom MTU size that is slightlysmaller than the default, which will get rejected less often by a router, its an old netadmintrick that has long been used to fix network troubles.

1. Open the Apple menu and go to System Preferences, then choose Network

2. Pull down the Locations menu and choose Edit Locations, then click the [+] plusbutton, give the new network location a name like Yosemite WiFi then click Done

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3. Next to Network Name join your desired wifi network as usual

4. Now click the Advanced button, and go to the DNS tab

5. Click the [+] plus button and specify a DNS server were using 8.8.8.8 for Google DNSin this example but you should use the fastest DNS servers you can find for yourlocation, it will vary. You can also use your own ISP DNS servers

6. Now go to the Hardware tab and click on Configure and choose Manually

7. Click on MTU and change it to Custom and set the MTU number to 1453 (this is anetworking secret from ancient times, and yes it still works!), then click on OK

8. Now click on Apply to set your network changes

Quit and relaunch any apps that require network access, like Safari, Chrome, Messages, Mail,and your wireless connectivity should be flawless and back at full speed at this point.

Reset SMCSome users report that resetting the System Management Controller is sufficient to stir theirWi-Fi back into action. Since many users have a MacBook laptop, thats what well cover first:

Turn off the MacBook Air or MacBook Pro

Connect the power adapter to the Mac as usual

On the keyboard, press and hold down the Shift+Control+Option keys and the Powerbutton at the same time, hold them all for a few seconds

Release all keys and the power button at the same time by lifting your hands away fromthe keyboard

Boot the Mac as usual

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You can read more about resetting SMC here and here for other Macs, including for theiMac and Mac Mini.

Unload & Reload discoveryd to Fix DNS & Wi-Fi Failures in OSX YosemiteAnother trick that was left in the comments (thanks Frank!) involves refreshing the discoverydservice by unloading and reloading it with the launchctl command. This is a bit curious butapparently it works for some users, suggesting there could be an issue with discovery orresolving DNS on some Yosemite Macs. Its certainly worth a try if the above tricks failed toresolve your wi-fi connectivity problems in OS X 10.10, as there are a fair amount of positivereports with this one:

1. Open Terminal (found in /Applications/Utilities/ or with Spotlight) and enter the followingcommand:

sudo launchctl unload -w

/System/Library/LaunchDaemons/com.apple.discoveryd.plist

2. Hit return and enter an admin password to use the sudo command

3. Now run the following command to reload discoveryd (this used to be calledmDNSResponder)

sudo launchctl load -w

/System/Library/LaunchDaemons/com.apple.discoveryd.plist

4. Again hit Return to finish the command

You may need to relaunch apps that require network connectivity. Note that if you reboot theMac with this one, you will have to repeat the above steps to unload and reload discoverydinto launchd.

Bonus OS X Yosemite Wi-Fi Troubleshooting TricksHere are some other less than ideal solutions that have been reported to remedy wi-fi issuesin OS X Yosemite.

Join a 2.4GHZ network (N network) some users report no trouble with 2.4GHznetworks

Set the wi-fi routers 5GHz (G) channel to be somewhere between 50-120

Turn Off Bluetooth We have seen several reports that disabling Bluetooth will resolvewifi problems with some networks, but this is obviously not appropriate for Macs thathave bluetooth accessories

If none of the above works, there could be other problems. Sometimes starting fresh with a

clean install could resolve them, or if you believe the problem to be a bug and you had a

trouble free experience in prior versions of Mac OS, you could always downgrade from OS X

Yosemite to Mavericks again until an update to Yosemite arrives to resolve the issue onceand for all.

Have you experienced wireless connectivity issues with OS X Yosemite? What have you tried,and how did you resolve them? Let us know what has been working to remedy your wifitroubles by leaving a comment!

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Related articles:OS X 10.10.2 Beta 3 Available to MacDevelopers with Focus on Wi-Fi &Mail

OS X 10.10.2 Beta 5 Released forDeveloper Testing

OS X Yosemite Mail Update Released for Developers & Public Beta

OS X 10.10.2 Beta 2 Released for Developers

Posted by: Paul Horowitz in Mac OS X, Tips & Tricks, Troubleshooting

242 Comments Comments RSS Feed

The Ketal says:October 25, 2014 at 3:01 pm

Some of the wireless connectivity problems may be an actual bug shipped with OS X Yosemite. I

found a fair amount of reports of people installing older kext files, specifically, the IO80211Family.kext

file, from beta releases that remedied their problem.

http://forums.macrumors.com/showpost.php?p=19442695&postcount=17

I have no tried it so I would proceed with caution, but it is worth noting the success rate with users in

forums.

If you tried the above tricks (good tips, they could work for many troubleshooting situations) to no

avail, and your Mac worked flawlessly in older Mac OS X versions, you may want to try forcing the

Mac to use the old kernel extensions. You can even copy them yourself from a Mac running

Mavericks, if you have one still.

Also, it appears there are some routers that are particularly problematic with Yosemite (and iOS 8 for

that matter).

I find OS X 10.10 to be very buggy, OS X 10.10.1 should be a better experience all around. Its little

things here and there, but it all adds up to a clunky experience.

Reply

3140

2113

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Go Utes says:October 26, 2014 at 11:48 am

Apple needs to release OS X 10.10.1 to remedy all these bugs ASAP

Reply

Casey says:December 7, 2014 at 2:13 pm

I have this and it still wont connect unless I use a cable *facepalm*

Reply

King in Calgary says:February 12, 2015 at 11:18 pm

Hi have OS X 10.10.2 recently upgraded on my new macbook pro just 2 days old

and its still doing this. I actually exchanged one I bought 2 weeks ago for this one

because the connection kept dropping wow, why am I not surprised this is still

happening. The guy at the apple store just went on their wifi, disconnected for their

wifi, and did it three times what a retard I told him it happens randomly by itself.

Reply

TrStall says:October 27, 2014 at 7:17 am

I did the replace on the 5 .plist files, and the new location, etc. Also rearranged and used

different DNS servers. Long story short, the .plist replacement fixes it..for a while. Then I

resorted to rebooting and that brought it back. for maybe a day.

BUt I cant get more than a few hours to a day.

Now after the .plist fix, I copied them off and when it totally locks up. I have to copy them all

back, reboot and Im back on the same horse.

Lasts a whilereboot the Mac a few times, tp last a little longer then have to replace the files.

WHY OH WHY do I upgrade to these things without waiting for the net 2 FIX levels!!!

Reply

sgtNYC says:November 4, 2014 at 3:58 pm

I tried everything mentioned in the article as well. Just like you experienced, my wifi

seemed to be ok at first. Then, within a few minutes, here we go again. So far the solution

to this problem is turning off the bluetooth. Apple, do something!!!

Reply

MccMillan says:December 6, 2014 at 7:32 pm

AAAAAARGHHHHHHHHHHHHHHHHHHHHHHH

I dont get more than TEN MINUTES. seriously. NOTHING has helped me.

Reply

bart says:December 8, 2014 at 3:26 pm

me the same, I just toke an ubuntu pc, I really afraid of future of apple

timothy says:November 2, 2014 at 8:46 am

I bought the new Mac 2014 ..

http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713785http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713785#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-739165http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=739165#respondhttps://www.kingrosales.com/http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-898208http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=898208#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-714483http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=714483#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-721062http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=721062#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-738887http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=738887#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-739884http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-719384

Shipped with Yosemite..

Well.. I cant connect to my Office WIFI and Even cant connect to my iPhone personal

hotspot

It was a nightmare.. tried to remove the preferences but didmt work for me.. should there be

any update to the OS..

Reply

Mikki says:November 16, 2014 at 5:55 am

I have a MacBook Pro (late 2012). Upgraded to Yosimite and began having problems with my

laptop mouse waking up. It takes a minute or more for the mouse to start moving after the

computer goes to sleep and wakes up. This problem has not been fixed

WiFi. My MBP was not able to hang on to a WiFi signal after upgrading. It continually turned on

and off.

This problem is now fixed: Go to WiFi click the drop down list and open NETWORK

PREFERENCES. Go to ADVANCE and open. Delete all the WiFi routers you no longer use. Move

the WiFi router/s you routinely use to the top.

I must have had 20 routers listed. When I cleared out the ones I no longer used and move the

current ones to the top, I havent had a problem since.

Reply

Tiff says:January 5, 2015 at 1:55 pm

Apple,

I have literally tried all of the suggested tricks that are offered by anyone and everyone for this

wifi connectivity problem. It is really difficult to run an office with this problem. We recently

converted to APPLE everything (computers, iPads, iPhones, ect.). I am starting to question my

choice to convert. We made the decision to convert because Apple is supposed to be more

reliable than anything else. My experience with this connectivity problem is making me doubt

this reputation.

It is definitely a problem that needs to be fixed ASAP. We can not function with the current

problem.

Reply

Stuart says:February 12, 2015 at 8:24 am

Quote We made the decision to convert because Apple is supposed to be more reliable

than anything else

this is only the case with regards to operating system stability.

the internals of a mac are no different to a windows based machine..

the hard drives are just as prone to failure as any other hard drive.

I love how people get duped into this whole the mac is better.

They have marketed their stuff the same way Bose have..

great product but way overpriced, people think if i pay more i get more..

Reply

Alfie says:January 13, 2015 at 8:02 am

http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=719384#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-729772http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=729772#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-753930http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=753930#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-896856http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=896856#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-756731

I tried option 2 and 4 and they have worked.thank god! At my hourly rate sorting these

problems I could have bought 3 macs..crazy. After extensive time on the phone with a very

nice young support guy, it seems if he only looked at this site the problem could have been

addressed in the short term. Does anyone know when the next Yosemite update is being

launched?

Reply

omar says:January 17, 2015 at 12:57 pm

i have a new mac mini (OS X 10.10.1) and it is very slow to send mail or download things, for

web browsing its ok. the problem solves when i connect the mini with a cable. this is no good

because i prefer to use the wifi in order to have less cables around my desktop. so OS X 10.10.1

has the same problems.

Reply

Mat says:October 25, 2014 at 3:24 pm

Well I have installed Yosemite with a very clean install (I mean 2 times), even resetting the Recovery

partition with the latest one included, but Im still facing Wi-Fi connection drops on my home network

once a day

Btw Im using a 2013 13 MacBook Air if it could help to troubleshoot.

It always has been so difficult for Apple to resolve and avoid wifi issues and I think its unbelievable.

The same could be applied to iOS.

Reply

mike says:October 25, 2014 at 3:30 pm

please help with BT, Apple stonewalling

Reply

Mick says:October 25, 2014 at 4:14 pm

Clean installed Yosemite and immediately experienced wifi speed drops and auto bandwidth changes

from 5ghz to 2.4ghz and back again. Sometimes would drop wifi completely. Tried changing network

name and altered DNS settings. Finally switched the wifi only off, on BT Router and attached Time

Capsule. Used bridge method to connect Router to Time Capsule and now use the Time Capsule wifi.

All seems well for the past 3 days.

Reply

Wharf Xanadu says:October 25, 2014 at 4:23 pm

Funny because wifi is like the only thing that actually works in Yosemite for me. Worst OS X version

made since 10.0

Reply

Raven says:October 25, 2014 at 5:23 pm

Yosemite runs flawlessly on my iMac. I can think of much worse versions.

Try installing it again. That seems to be fixing peoples problems.

Reply

NickO says:

http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=756731#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-758619http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=758619#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713094http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713094#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713100http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713100#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713116http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713116#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713123http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713123#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713134http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713134#respond

October 25, 2014 at 6:22 pm

Mine too. Installed flawlessly, runs without a hitch. My only complaint is the trash can

looks like wide pint glasswithout the beer!

Reply

L-A says:November 29, 2014 at 3:31 pm

re: empty pint funny!

Reply

Macalicious says:October 27, 2014 at 11:53 am

I wish I can say the same. My wifi took a dump and all types of functions in my browsers

fail. Safari and Chrome

Reply

Alan says:October 25, 2014 at 5:01 pm

Step 1 of this article solved wireless network problems using Safari in Yosemite. Thank You!

Reply

Rollo says:November 2, 2014 at 3:10 pm

Same Here. 1st step working normally for 3+ days

Reply

A. says:January 13, 2015 at 2:46 pm

Ditto, although I never saw a file named com.apple.network.identification.plist. I deleted

the others and it worked perfectly. Fingers crossed that this sticks

Reply

Svs says:October 25, 2014 at 5:14 pm

Im using snow leo 10.6.7 /mbp 2010/ and mountain lion 10.8.5 /mba 2013/ and have not any problem

))

Reply

Jason says:October 28, 2014 at 1:11 pm

Thats the worlds most least helpful comment, this thread is about wifi problems on people who

have upgraded to Yosemite While youre at it why dont you tell us how your wireless mouse is

working fine or maybe your ballpoint pen still has ink in it

Reply

Alan Jacobson says:December 5, 2014 at 6:34 am

LOL, Jason but some folks believe in the theory if it works, dont fix it and I agree it was a

totally useless contribution.

Im sure some of them still using Chariots will trade up when the horses die.

For those suffering from Yosemite Upgrading, it is annoying but it seems prevalent on the

Mac Mini, our other machines flipped over faultlessly.

http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713154http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713154#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-735911http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=735911#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-714645http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=714645#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713130http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713130#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-719466http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=719466#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-756863http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=756863#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713132http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713132#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-715473http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=715473#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-737853

Hopefully sooner or later a service upgrade and bulletin will address the issue. Meanwhile

my ethernet backup is holding down the fort, but I will have to upgrade my flintlock

soon.

Reply

Marquette says:October 25, 2014 at 5:19 pm

Ive noticed my wireless connection to my printer has stopped entirely. USB connection is still fine. I

have no clue what happened, but am certain it is a result of Yosemite.

Reply

Rebecca Taniguchi says:October 30, 2014 at 8:17 am

Same here. At least I got rid of this Yosemite problem by re-loading printer software from the

printer site.

Yosemite is a mess!

Reply

Nick Lucas says:October 25, 2014 at 5:28 pm

Sigh.this is why since 10.6 I have waited to move to the next Mac OSX version. Been on Mac since

10.2 and when upgrading 10.3-10.5 as soon as they came out, I have always had wifi issues until

10.x.1 arrives. Glad I waited again.

I have never understood why each new OS X version presents problems in connectivity EVERY TIME.

Reply

Carole says:October 25, 2014 at 5:41 pm

I spent one hour on the phone with Apple and AT&T before it was fixed. The only good news is that it

is fixed!

Reply

Go Utes says:October 25, 2014 at 7:26 pm

What did Apple and AT&T tell you to do to fix it?

I reset SMC, made the new network prefs and set DNS as defined above, that usually does the

trick.

Reply

Freddy says:October 25, 2014 at 6:10 pm

Uh, my closest options to setting my Airport Extreme between 50 and 120 on 5GHz are 48 and 149.

How is one supposed to do this?

Reply


Choose 149 and see how it goes, if it doesnt work, try 48.

Personally I think this is obviously a problem with OS X Yosemite and NOT any router, yea I

understand problems are worse with some routers but that should not happen, the OS should

http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=737853#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713133http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713133#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-717054http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=717054#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713135http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713135#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713140http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713140#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713176http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713176#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713150http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713150#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713177

be router agnostic. Heres the hint, everyones internet worked fine in 10.9, the crappening came

with 10.10. Lets hope there is a Wi-Fi fix in 10.10.1 and a million fixes to the other problems, not

to mention an option to fix the terrible UI.

Reply

Frank says:October 25, 2014 at 6:40 pm

I did a clean install of Yosemite. I lose internet connectivity when I reboot. I run the following in a

script, which fixes it until the next reboot:

sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.discoveryd.plist

sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.discoveryd.plist

Reply


Is your wifi problem only in Apple apps like Safari? Ive noticed Safari is very unreliable now,

Chrome holds a connection better.

Reply

Frank says:October 25, 2014 at 7:49 pm

That does appear to be the case.

Reply

Marc says:October 27, 2014 at 1:17 pm

Except Chrome now eats through battery faster than a

Reply

Pablo says:October 25, 2014 at 7:39 pm

This worked for me too in the same way: until the next reboot.

Reply


It looks like this discoveryd service replaced the following in Yosemite:

com.apple.mDNSResponder.plist

com.apple.mDNSResponderHelper.plist

This could explain why Safari and other Apple apps fail with wi-fi more often or are very

slow to resolve DNS, and why setting DNS manually rather than letting DHCP retrieval

alone do the work is effective.

There is clearly a variety of wi-fi networking bugs in OS X Yosemite. This is not GM quality.

Reply

Paul says:October 25, 2014 at 7:49 pm

Great trick, it seems this is helping a good amount of users. We added it as another option,

thanks Frank!

http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713177#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713163http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713163#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713178http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713178#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713187http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713187#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-714688http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=714688#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713184http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713184#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713189http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713189#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713188

Reply

Yarrow says:October 26, 2014 at 2:17 pm

Frank you are THE MAN! Nothing worked until your trick, thank you!

By the way I had no issues until I used Migration Assistant to bring in my account from

Mavericks. Is seems to especially affect people who have upgraded from Mavericks to

Yosemite.

Reply

Mark says:October 27, 2014 at 6:42 pm

Only thing that worked for me. First two tricks did nothing.

Thanks Frank and to the author for putting such a comprehensive guide to fixing this problem.

Reply

Scott says:November 19, 2014 at 4:08 pm

Frank, I ran the sudo command and lost use of Safari, the App Store and the Apple Mail

application. Any tips on how to fix? I do not have time capsule or else I would undo the action.

Appreciate your time in advance,

Scott

Reply

Ryan says:December 17, 2014 at 8:54 am

Ive noticed issues with discoveryd and Yosemite, but it is not limited to WiFi (also happens

when connected via ethernet). It seems periodically (2-5 times per day) I will lose the ability to

connect to most network-enabled apps (Mail, Safari, etc., though Google Chrome is immune,

presumably because it rolls its own discovery frameworks). When I look in Activity Monitor,

discoveryd is using 100% CPU. Quitting discoveryd from Activity Monitor immediately restores

the connectivity, which I imagine is accomplishing the same thing as unloading and reloading

the plist.

So can anyone else confirm this pattern? Check Activity Monitor for discoveryd next time you

have an issue and see if you notice the same. Also, if you do, confirm that it happens regardless

of connecting via ethernet or WiFi.

If its the same thing, its certainly more user-friendly to quit discoveryd from Activity Monitor

than run terminal commands, so it would be good to confirm this is the same issue.

Reply

cashxx says:October 25, 2014 at 7:34 pm

No problems here on Early 2009 MacBook Pro 17.

Reply

William Scott says:October 25, 2014 at 8:10 pm

Thanks for the article. Ive found after upgrading each computer on my home network from 10.9.5, wifi

problems very consistently appear (with my Apple Airport Extreme ie, all Apple hardware. They all

seem to originate from DNS resolution issues, and most of the problems disappeared by assigning

these computers static IP addresses, and addressing devices with these numerical IP addresses

http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713188#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713846http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713846#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-714877http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=714877#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-731791http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=731791#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-745607http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=745607#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713182http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713182#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713193

rather than the domain name. This is a very clunky workaround, so I am pleased there are better

approaches.

Reply

Noa says:October 26, 2014 at 10:32 am

There may be a problem with some users HOSTS file, corrupted during the upgrade

(downgrade) to Yosemite. Restore your original untouched hosts file:

http://osxdaily.com/2014/04/12/restore-original-hosts-file-mac/

And you may find that to be sufficient to get online.

Check the contents of your hosts file, if it is garbled nonsense, its probably corrupt.

Reply

Luke says:October 25, 2014 at 11:22 pm

Followed the instruction and found 4 of 5 files listed above to be erased. The missing one:


It is not in the folder. Should I worry?

Appreciate your help.

Thanks.

Reply

Stph says:October 26, 2014 at 10:55 pm

I am having the same problem.


Is not in my system config folder. Any suggestions? Just deleting the 4 files from the list that I

did have in the folder hasnt solved the problem.

Neither has creating a new Wifi network location

Reply

archamedies says:October 27, 2014 at 8:49 am

If the file is not found in your folder just skip over it, but you must create a new network

location in the Network preference panel (which will probably generate that file)

Reply

Bianfa Gasvar says:October 25, 2014 at 11:35 pm

The easiest solution that worked for me:

1- Open system preferences.

2- Click on Network.

3- Click on assist me.

4- Leave it there meanwhile you need internet, minimize the window or whatever and the wifi

connectivity wont let go.

5- Wait for Apple to solve the problem.

http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713193#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713722http://osxdaily.com/2014/04/12/restore-original-hosts-file-mac/http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713722#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713314http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713314#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-714168http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=714168#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-714547http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=714547#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713319

Reply

Tonya says:February 6, 2015 at 9:07 am

Thanks so much Bianfa! That solved the problem for me!

Reply

Emil says:October 26, 2014 at 1:57 am

Hey there.

Im trying to troubleshoot with step 1.

Im in the System Configuration folder but I dont seem to have the file:

com.apple.network.identification.plist.

I do have a file called: com.apple.network.eapolclient.configuration.plist is this the same file?

Reply

Emil says:October 26, 2014 at 1:58 am

Note.

Ive updated from Mavericks to Yosemite.

Reply

logic says:October 26, 2014 at 10:24 am

If a filename has a DIFFERENT name it is NOT the same file, you can double-check the actual

file by using the cat command:

cat (filename)

comparing to

cat (filename 2)

I have not seen that specific file, what is it?

Reply

David says:December 7, 2014 at 2:56 pm

Im trying to do step 1 as well, but have this same issue in that I have a file called

com.apple.network.eapolclient.configuration.plist but not one called

com.apple.network.identification.plist this is the only network file in that folder.

BTW, Im on a 2011 MacBook Air with OS X 10.10.1.

thanks

Reply

Alberto says:October 26, 2014 at 2:52 am

I dont use a router and I have wifi issues.

I use a Mac Mini to share the ethernet connection via wi-fi, to other computers. The connection fails

every 5 10 minutes.

I dont think that the issues are related to any router but to the Mac system itself.

And none of the solutions above worked for me.

Reply

http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713319#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-873935http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=873935#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713414http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713414#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713418http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713418#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713716http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713716#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-739173http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=739173#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713489http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713489#respond

Frank Harland says:October 26, 2014 at 5:13 am

https://www.dropbox.com/s/mro985113alp2vw/Schermafdruk%202014-10-26%2013.06.18.png?

dl=0

list of items in the /Library/Preferences/SystemConfiguration/ is unlike the one you described. Which

files should I remove?

Thanks for your effort.

Reply

Cory949 says:October 26, 2014 at 4:03 pm

In my references folder the files are;

ByHost

com.apple.JapaneseAnalysis

com.apple.LaunchServices

com.apple.VoiceOver3

com.apple.VoiceOver4

Macromedia

Microsoft

org.videolan.vlc

Parallels

There is not a SystemConfiguration folder. Searching for SystemConfiguration or any of the 5

files shown in Step 3 cannot be found.

Reply

Cory949 says:October 26, 2014 at 4:04 pm

Sorry, to be clear that is preferences folder

Reply

Rob Record says:November 3, 2014 at 12:23 pm

You need to be in the main /Library, not your user ~/Library.

Reply

Mike says:October 26, 2014 at 10:00 am

I dont access the Internet through WiFi, or Bluetooth, but rather through a USB modem. I cant

access the Internet Safari through my USB modem on my Macbook Air after upgrading to Yosemite. I

know the modem is seeing my ISP, Verizon, becusae the modem shows active and I get an IP address

when I am in preferences. Apple Support was useless and I spent two hours on the phone with my

ISP, they were surprirsed that this upgrade no longer has the Ping or Trace utilities. Any ideas would

be appreciated

Reply

vxbush says:November 4, 2014 at 9:50 am

Just FYI: I have a brand-spanking new Macbook Pro that came with Mavericks and I installed

Yosemite on it. I had both ping and trace.

Reply

http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713571https://www.dropbox.com/s/mro985113alp2vw/Schermafdruk%202014-10-26%2013.06.18.png?dl=0http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713571#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713925http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713925#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713928http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713928#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-720131http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=720131#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713703http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713703#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-720811http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=720811#respond

Bernard says:October 26, 2014 at 10:22 am

You would have thought they would have had a beta to pick up this kind of problem.

Reply

Richard says:October 26, 2014 at 10:24 am

Thanks! I as well ran into a situation where my Device Name was being modified randomly by adding a

numerical designator at the end of my Device Name. Attempted numerous times to change but no

avail. This prompted me to call Apple who at first was baffled by this problem but suggested there

must be a conflict in my Time Capsule configuration as the source.

During troubleshooting, my ISP connection was lost forcing me to call my provider who sent a refresh

signal. Once I came back online I found that my Device Name listed on the wireless clients portion

was incorrect. Once I corrected OS X 10.10 for my correct name & then reboot both my iMac & Time

Capsule did the corrected Device Name now was listed in both.

Just FYI

Reply

Jim Murphy says:October 27, 2014 at 6:57 am

HI, Richard, I had that problem as well and Apple helped me with it . I was up to number 9 on

my list of printers and I only have one printer.

Reply

Bram says:October 29, 2014 at 1:39 pm

Device Name was being modified randomly by adding a numerical designator at the end of my

Device Name

Richard, what did you do to solve that?

And how did you correct OSX for correct name?

Reply

Howie Isaacks says:October 26, 2014 at 11:10 am

Great stuff! Thanks for posting this. I was having a lot of DNS caching issues with my MacBook Pro. It

got really bad. Clearing the cache seemed to only fix the issue for a short while. I would lose

connectivity to my email server, and CalDAV connections would fail randomly. Yesterday, I made a

clone of my MacBook Pro onto an external USB3 drive, and erased and reinstalled. I performed a

standard data migration using the Migration Assistant. The erase and reinstall eliminated any left over

issues deep inside OS X, including caches, and other config files that will effect DNS and general

connectivity at the lowest levels of the OS. This seems to have resolved my issues totally, but time will

tell over the next few days. My Mac mini did not have any connectivity issues at all, so this seems to

be more of a problem with Apple laptops than with a desktop system. I also dont put my Mac mini to

sleep, and then move around to different locations.

Reply

GlennMcQ says:October 26, 2014 at 11:38 am

While I appreciate anyone posting fix it info for connectivity issues, I have to say that these

instructions were very difficult to follow and assume that the user knows almost as much as the writer.

I simply couldnt follow what to do, from step one in:

http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713713http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713713#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713715http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713715#respondhttp://www.remarkableroi.com/http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-714476http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=714476#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-716460http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=716460#respondhttp://www.thinkfixed.com/http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713752http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=713752#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713772

1: Remove Network Configuration & Preference Files

Both step one and step two in this dont tell you how to find and/or open the correct place to find

these instructions. I figured out step one after a few minutes, but step two was harder.

From there it was down hill.

Can anyone please post this for beginning users?

Thanks, and please, no flaming. Not everyone is a Mac whiz yet.

Reply

matt says:October 26, 2014 at 11:48 am

Im a bit confused, the instructions for how to remove the network configuration and preference

files are directly below the step 1 header, it tells you how to find the files and open that system

folder in 6 steps. Did your web browser not load the complete article?

Reply

GlennMcQ says:October 27, 2014 at 2:33 pm

Matt, I think it loaded everything. Im not well versed though in Mac terminology. For

instance:

1. Turn Off Wi-Fi from the Wireless menu item.

2. From the OS X Finder, hit Command+Shift+G and enter the following path:

What is the wireless menu item?

What is the OS X Finder? And what does hitting Command+Shift+G actually do?

Were talking pretty low level of knowledge here, obviously.

It just gets worse from there for me, unfortunately.

So for me, the instructions arent clear enough. I imagine this is easy stuff for people well-

versed in their Mac OS.

Im still learning.

But I do want to make sure my router is stable with this Yosemite upgrade.

Reply

Tim says:October 28, 2014 at 5:33 am

The instructions are fairly clear and assume a very low level of knowledge. No

offense, but if you dont know what the Wireless menu and Finder are then youre

lacking even the most basic knowledge to operate a Mac. You should really

consider using the tutorials that come with OS X or getting some help at your local

Apple Store.

The Wireless menu is the icon at the top right corner of your screen that looks like a

striped cone (if connected to a Wi-Fi network) or an empty one (if not connected).

Finder is the file management application built into OS X. You can open a Finder

window using the blue/grey icon (looks like a smiling face) on your taskbar at the

bottom (icon is usually at the farthest left) or by double-clicking on Macintosh HD

if its displayed on your desktop.

Reply

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Jim Murphy says:October 26, 2014 at 6:26 pm

Couple of things.

Thank you for all your tips. They are always helpful and in a language, I, a non-techie, can understand.

Lesson Learned:

After years of installing Mac operating system shortly after they came out, I have finally learned my

lesson. I believed the hype about how field-tested for months Yosemite was.

Well it has wasted much of one day for me earlier in the week trying to send email, and about seven

hours today trying to get 2 laptops to print over my wireless network.

My story:

When I could print from my desktop this morning, but not from either of our laptops, I tried permission

repairs, restarting, turning my Airport Extreme on and off and more. No luck. So my wife convinced me

to call Apple and not waste my whole day. As it turned out, I wasted it anyway, thanks to Yosemite.

The Apple rep, who was very courteous and tried everything he could to get me up and running, was

on the phone with me from about 1:51 p.m. to 3:15 p.m. He had me add and delete printers on my

desktop, walked me through a number of other things through System Preferences, and finally had me

reset the printing system. I still could not print from the laptop.

At that point, he referred me to Hewlett Packard since he felt it must be a problem with the printer

driver, even though I have the latest. I called HP, and they kicked me to a business line that does not

work on Sunday.

Along the way, I tried your tip to remove and configure the network configuration and preference files,

although I was a little nervous about this.

I did not have the guts or expertise to create a new Wi-Fi network location with Custom DNS.

After a break, when my laptop still showed my printer was not connected, I did a Network Diagnostic.

The server failed, and showed a red light. Everything else was a green light.

Suddenly, I decided to go to my laptop and delete and add the printer there. It worked. So I did the

same on my wifes, and it worked.

Finally I got it printing.

But I also had additional, time-consuming problems earlier this week with Yosemite, which were really

exasperating.

Other glitches

Email Formatting: After downloading Yosemite, I no longer could get From, To and Subject Info to print

on the same page as the body of the email. As a default, the To/Cc label shows separately for some

absurd reason. When I eventually unclicked that in email preferences, I was able to print as before.

Outgoing email was offline: I had a slight problem earlier in the week while working in another officc. I

could not send any email from my laptop. By doing repair permissions, restarting and reinputting my

incoming Comcast.email password, I was able to send again.

But at 6 p.m. that evening, after sending a bunch of emails from on comcast. net, I suddenly could not

send out anymore. I went through a bunch of machinations again, checked Comcasts site, and a

bunch of Apple support sites, but my outgoing mail server was still offline. At that point, the light went

on. I went back in, erased both my incoming and outgoing mail passwords, and put the original

passwords back in. Eureka. I was in the world of outgoing mail again.

I know its not easy to catch all the bugs in operating systems. But Apple certainly seems to have

taken many steps back in quality control.

http://www.remarkableroi.com/http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-713993

Next time, I wait. And wait.

As one old saying goes, Once bitten, twice shy.

Another: Fool me once, shame on you. Fool me twice, shame on me.

I have learned my lesson with Apple. I wont be fooled again.

Jim Murphy

Reply

PH says:October 26, 2014 at 8:42 pm

Unfortunately, OS X Yosemite has shipped with a large amount of bugs that negatively impact

normal users. Youre right, advanced Mac users may be able to troubleshoot this stuff, but it still

takes hours and hours to figure out whats wrong and how to resolve it, whether its the wi-fi

problems, Mail problems, printer problems, Bluetooth problems, usability problems, there is so

much wrong with Yosemite its just not ready for prime time. Hours of troubleshooting should not

be a requirement in a shipping production operating system, thats what many of us abandoned

in the Windows world to move to a Mac exactly to avoid.

At this point Im advising anyone against updating to OS X Yosemite until OS X 10.10.1 if not

beyond, it badly needs further testing and bug updates. Apple shipped this thing before it was

cooked. Let Apple know youre dissatisfied, thats the best thing you can do.

Reply

DJ says:October 27, 2014 at 7:01 pm

Hmmm, maybe apple gets its trouble shooting free on this OSX web page!! Im having

many of the same issues. Ill try some of the fix trix and see if they work.

Reply

pyra says:October 26, 2014 at 7:09 pm

On my system just running Chrome causes the system to loose DNS cant ping or dig anything

and I have to logout and log back in. Using Safari is fine.

Reply

Aaron says:October 26, 2014 at 10:51 pm

WOW, my poor internet provider- Ive been cursing Cox lately thinking it was them. I did steps one and

two, and Safari flies like I remember.

Thanks!

Reply

Jeff says:October 27, 2014 at 5:31 am

Thanks the terminal commands were the only thing that worked. It makes sense, because the DNS

could not be connected (didnt matter which one was used). I only saw this problem on the release

version not on DP1-7 & GM1&2.

sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.discoveryd.plist

sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.discoveryd.plist

Reply

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Brad says:October 27, 2014 at 12:07 pm

My issue turned out to be the 5GHz radio. I disabled the 5GHz radio on my Linksys WRT1900ac router

(Put it on a different SSID) and now I am working just fine. I havent dropped a wifi connection in at

least 3 hours, the longest yet.

Reply

K says:October 27, 2014 at 12:20 pm

If all else fails (Ive tried all tips and tricks suggested here and on the official Apple forum) and youre

desperate, heres a script that might help.

Just copy/paste this to an emtpy file (e.g. fix-wireless.sh)

#!/bin/bash

IF=en0

GW=`/usr/sbin/netstat -rn | /usr/bin/grep default | /usr/bin/grep $IF | /usr/bin/awk { print $2 }`

PING=/sbin/ping

OPTS=-b $IF -c 1 -t 2 -i 2

while [ 1 ]; do

$PING $OPTS $GW >/dev/null 2>&1

if [ $? -ne 0 ]; then

dt=`date +%F %T`

echo $dt Fixing Wireless

/sbin/ifconfig $IF down

sleep 2

/sbin/ifconfig $IF up

sleep 10

fi

sleep 10

done

Make sure that the GW line ends with a on the same line (without a line break).

After that, make this executable:

chmod +x fix-wireless.sh

Next open a terminal and run:

# cd

# sudo ./fix-wireless.sh

And leave it running in the background.

Yes, its a sad work around and even more sad that Apple still didnt fix this after more than a week of

launch.

Reply

Andre Simones says:October 27, 2014 at 1:02 pm

I tried everything in the article but nothing worked. I finally reset the SMC and everything has been

working fine since (about 4 days).

http://support.apple.com/kb/ht3964

Reply

Nathan says:October 27, 2014 at 5:37 pm

After using option 1 today, my wifi has had a steady connection for over 8 hours. It has survived sleep,

http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-714650http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=714650#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-714658http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=714658#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-714681http://support.apple.com/kb/ht3964http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=714681#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-714850

reboot, video, and apple tv running netflix. Also, my wifi seemed to cut out with me taking phone calls

on my iPhone I was unable to confirm. Ive had no trouble with that now either.

This is the longest fix Ive experienced. Heres to hoping this is permanent.

Reply

Nathan says:October 30, 2014 at 11:48 am

Well, its very sad after nearly three days of perfect working wifi, the problem has resurfaced.

Have to admit this is such a disappointment with Apple. The products are not priced low

enough for any user to accept this sort of problem and their lack of response.

Reply

ray says:October 27, 2014 at 9:35 pm

Thank you!!!! your solution solved my problem connecting to the Internet after installing. I really

appreciate you providing the help.

Reply

ray says:October 27, 2014 at 9:35 pm

Thank you!!!! your solution solved my problem connecting to the Internet after installing. I really

appreciate you providing the help.

Reply

Michael says:October 27, 2014 at 9:45 pm

I updated from 10.9 to 10.10. I had multiple issues that I now know were caused from this update.

Some are fixed. The worst problem now is that My KODAK printers will not connect to a new gateway

that I got from UVerse (because of internet speed degradation.) I tried reinstalling printer software,

drivers and firmware. Still not able to connect to wifi with printers even though MacBook Pro, iPad2,

iPad Air and 5th gen iPod all connected flawlessly. Chatting with Kodak support and was told that

they are working 24/7 and that I would not even be able to print via USB until they fix the issue!

Reply

JimB says:October 28, 2014 at 1:14 am

We have done extensive testing since Yosemite was released to the general public, and all of the fixes

mentioned herein will probably make no difference. The patch/fix has to come from Apple. We noticed

issues with Mavericks also relative to a slow down in response time when connected to the internet

behind a router running NAT/PAT. However, in Mavericks the problem was not fatal, it was slow and

annoying, and then might clear itself up for awhile. However, in Yosemite the internet connection

problem is near fatal. We have tested with multiple routers, and multiple configurations. The only way

we have been able to make Yosemite perform well when connecting to the internet, is to put the

computer in front of the router, or delete the router from the configuration. So, while not confirmed, we

suspect the problem is related to NAT (network address translation)/PAT (port address translation), and

quite possibly some other things. The bottom line however is that you can try all you like, but until

Apple figures out what the problem is, and provides a patch, you probably wont see much of an

improvement in performance regardless of what you try. Of course unless you want to put your

computer in front of your router. Not sure how Yosemite got out on the street with this type of issue.

However, it is simply unacceptable. We are now rolling servers back to Mavericks because they simply

do not work with Yosemite. There are many other issues with Yosemite, but we wont go into those

now. Bottom line, put the pressure on Apple to deliver a solution!!

Reply

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David says:October 28, 2014 at 1:05 pm

I am neither enthusiast nor expert. I just want my bluetooth to work again following Yosemite

installation on to my Macbook Air. Bluetooth connection to my Bose speaker no longer works. In fact,

even a cable connection to the speaker does not work. Since installing Yosemite, only the Macbooks

internal speakers work. Unbelievable that Apple seem to be taking no responsibility to fix this. Any

advice? In laymans language please.

Reply

Emily says:November 2, 2014 at 11:46 am

Im experiencing the same thing, David. My $300 Big Jambox no longer works, whether plugged

in or other Bluetooth, since I upgraded to Yosemite. I am PISSED. I use this speaker every single

day to listen to music as I work.

Reply

Edward says:October 28, 2014 at 4:46 pm

I have new retina 5K iMac and experiencing very slow WiFi connection. The connection doesnt drop

but I tried 3 days downloading Xcodes documentation and

Ive tried most(every) method presented in the thread but the kext. Would it be safe to load old kext on

the new Machine?

I turned off handoff from all my apple devices and it seems to make the speed a bit faster.

Reply

Jake says:October 28, 2014 at 5:02 pm

First tip worked perfectly for me.

Reply

Rich says:October 29, 2014 at 5:02 am

I ended up turning off my wi-fi and hard wired my iMac. No reboot issues thus far.

Reply

ScottN says:October 29, 2014 at 7:51 am

I tried all of Pauls suggestions and Wifi was still getting dropped. Then called Apple Support, and they

put me through all the same steps. Still didnt work. Finally, I reset my Wifi Router and Cable Modem.

Tada! Wifi is now working flawlessly.

Reply

ScottN says:October 30, 2014 at 1:22 pm

Spoke too soon. The connection stayed up most of the day, now its back to dropping the

connection. Resetting the Router helps for a little while, but then the problems start again.

Reply

Matt says:October 29, 2014 at 8:38 am

I actually experienced less overall drop issues with bluetooth on. however i also experienced 10 drops

in 3 minutes with it on but these burst are farther apart.

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turning wifi off and on again made me reconnect quickly making me think that there is some setting off

somewhere

Reply

James says:October 29, 2014 at 11:28 am

Great article, solved my problem in 2 minutes Fingers crossed it soesnt come back as another

commenter experienced

Reply

Robert says:October 29, 2014 at 12:27 pm

I cant explain, why my solution worked for my MacBook Pro 2009.

But try to reset your computers PRAM:

http://support.apple.com/kb/PH14222?viewlocale=en_US

Maybe some wrong data in your PRAM needs to be deleted?

PS:

Also i have an iMac mid 2010, but it has not the WiFi Problem.

I have updated both from Mavericks. (NOT a clean install)

Hope this will help you!

Reply

Teo says:October 30, 2014 at 1:38 am

I had similar problems with wifi after upgrading to yosemite. In particular: my wifi was stable (no issue

in the logs) as long as my traffic was low. As soon as I had an intense traffic over the airport it was

disassociating from the router and reconnecting after a couple of minutes. None of the suggestions

above helped me unfortunately.

I discovered instead that associating to only one of the two bands of the router (either the 2.4 or the 5

GHz) was solving my issue.

In the time capsule (my specific case), I just renamed the 5 GHz band with another SSID: I associated

the MBP to the 2.4 GHz band and I was able to go over more than 170 GB of data transfer without

issues. Instead when the 2.4 and the 5 GHz were sharing the same SSID, after few tens of GB transfer

the airport was going down with strange logs (dissassociation due to inactivity).

I suspect that there is (beyond possibly many others) a bug in the way the two bands are treated with

the new airport drivers (maybe combined with hardware specs). At least this is another thing that

worked for me and that restored my MBP to normal usage.

Reply

ChrisV says:October 30, 2014 at 5:55 am

I want to report my experience with slow wifi on my mac book air after Yosemite upgrade. Tried all

tricks on article but no luck. One important note : I operate my mac with closed lid and external

monitor (plus bluetooth keypad and mouse). when I deactivate bluetooth (opened the lid and used

trackpad ) wifi speed went up. Went out bought a wireless mouse and keyboard with cable. same slow

performance ;-(( but when I open lid , wifi speed increases dramatically. so in my case has something

to do with the lid operation. Has anyone heard something like this ?

Chris

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Reply

Rob Record says:November 3, 2014 at 12:31 pm

The wifi antennae is around the outside of the screen so having the lid up allows it to get a

better signal.

Reply

Elaine says:October 30, 2014 at 11:40 am

i am officially panicking right nowi used Kext Fix and yes it fixed the wiFi issue but NONE of my

apps that require internet (iMessage, DropBox, Safari you name it) is working EXCEPT for

Chrome..

please

help

https://www.reddit.com/r/apple/comments/2jwah7/psa_yosemite_wifi_issues_list_of_possible_fixes/

Reply

Rob says:October 30, 2014 at 11:48 am

After I installed Yosemite, I launched System Preferences and clicked on Network. Then I clicked on

WiFi. No network was selected, so I selected my network. I entered my password. Problem solved!

Dont do all this complicated stuff until you try something easy like this.

Reply

Harold says:October 30, 2014 at 12:37 pm

I had a lot of problems. Dropping connections etc.

Strange thing is that whilst no apple apps were able to make a connection to the internet (mail, safari,

even ping), Chrome was working perfectly. I was thinking of some sort DNS problem. Deleting the

bluetooth prefs. also helped until you turn it on again.

The problem was resolved when my Airport Express (bridge mode) was connected through a network

switch to the (sitecom) router, rather than connected directly. So the Wi-Fi problems might not be a

Wi-Fi problem but a Route/DNS problem.

Reply

Darren says:October 30, 2014 at 1:01 pm

Ive noticed problems with no network connection in Yosemite as well however when I noticed the

problems I also noticed issues logged in /var/log/system.log pertaining to Bonjour SleepProxy and the

wifi remains connected.

One of my appletvs took over the MAC of my macbook wifi in order to work with Bonjour SleepProxy

and the mac complained of that appletv still holding onto the DHCP lease which seemed to result in

the macbook losing connection periodically.

I ended up configuring my macbook not to sleep and this seems to have stopped it although its hardly

ideal.

Perhaps some of your members might want to examine their system log to see if they see something

similar.

The appletv is a V2 jailbroken to run XBMC also in case that helps and it might be an incompatibility

between the old version of IOS on that ATV2 and Yosemite.

Reply

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GEO says:October 30, 2014 at 3:19 pm

Suggestion #1 solved my problem! Thanks.

Reply

Nasada says:October 30, 2014 at 3:32 pm

I was having the same issue on my mid 2012 MacBook Air a few days ago. None of the things listed

here worked. I was able to find a solution on iDigitalTimes. I was able to get WiFi working with these

instructions:

1. Shut down the computer.

2. Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already

connected.

3. On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the

same time.

4. Release all the keys and the power button at the same time. 5. Press the power button to turn on

the computer.

I have a MacBook Pro Retina that didnt have any issues by the way. It didnt matter what network I

was on, being that it didnt work on the work network either. I hope this helps someone as it was really

bothering me.

Reply

iceberg says:October 31, 2014 at 8:44 am

Yea no wireless printing in Yosemite.

I have a Canon Pixma MP450. Canon says its an Apple Issue and Apple says its a Canon issue. Go

figure.

Reply

Dick Kenny says:October 31, 2014 at 10:56 am

Apple provide free telephone support for 90 days for OS upgrade problems. Its a pain to get through

recently, but once you do, and receive a case #, it much quicker, and they will call you back. Even

automatically after a couple of days to check if it is still working. Ive had two aborted solutions

supplied; but the third a fresh install of Yosemite has worked perfectly for the past three days. In

fact Safari is faster than when running under Maverick.

Reply

Jim Murphy says:October 31, 2014 at 11:57 am

After thinking I had everything fixed last Sunday night, my wifi stopped working on Monday on our two

laptops. Apple suggested I talk to H&P about my LaserJet 1300 but H+P did not think it was

supported. But Apples site says it is. I waited fruitlessly for an Apple fix, then went through your

tutorial again yesterday, deleting those preferences again. Finally I got everything working, and it still is

24 hours later. By the way, when I tried doing a network diagnosis, it came up all green every time. So

that did not help me.

Thanks again to you guys. For these Yosemite problems, you are absolutely the best site I have found,

and I have looked at many. I really appreciate the help. More than you know.

Reply

Shai Samuel says:October 31, 2014 at 2:12 pm

http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-717438http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=717438#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-717445http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=717445#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-718087http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=718087#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-718170http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=718170#respondhttp://www.remarkableroi.com/http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-718204http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=718204#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-718265

I have been battling with slow internet (in any browser) since the release of the new OS, few weeks

ago. When I tested my internet speed it was fast (43M), but opening site could take forever.

I followed the first suggestion (1: Remove Network Configuration & Preference Files), and everything

now seems to work fine.

Thank you !

Reply

user says:November 1, 2014 at 5:13 am

Its unbelievable that this happens every time Apple puts out a new OS. I thank you for this article but

Im not willing to go through all this trouble. It seems like Apple is not a guarantee of quality anymore,

and the Air that I have will be my last Apple computer.

Reply

Marcello says:November 1, 2014 at 11:54 am

I noticed WIFI problem is connected to USB activity.. Unplugging external USB objects.. specially long

chain ones like hubs or (in my case) a OWC MiniStack avoids the problem

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liva says:November 1, 2014 at 3:40 pm

disable localisation for every application > no more probleme with my wifi

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Mark says:November 2, 2014 at 12:46 pm

Very unhappy with the issues that Apple seems to be introducing and re-introducing with every

upgrade: iOS7/iOS8 IIS login issues, OS X Wifi dropped connections, not found airport devices

These are old issues that recur with every upgrade: is Apple turning into Microsoft?

(I will not even get into the disaster that the iWork suite upgrade turned out to be.)

Reply

Daryl says:November 2, 2014 at 1:27 pm

My Mac Pro experienced all the connectivity issues detailed here. I followed the steps in the article

above (just up to the DNS server stuff) and it worked. Thanks OS X Daily!

Reply

Paul says:November 2, 2014 at 2:10 pm

Youre very welcome, glad to hear you have your wi-fi working again!

Reply

Al M. says:November 3, 2014 at 7:19 am

I read about this problem Fri. on MacNN then, as if jinxed, had only 1 to 1.5 MB/s downloads my

Yosemite MacBook (late 2013) the next day (despite my iPad having normal downloads sitting 3 feet

away). Tried first two fixes above without it helping. Next day, back to normal download speeds. First

week and a half with Yosemite were also fine. I was going to try turning off my ISP and Airport routers

for 5 minutes, but no need now. (Hmmm, no Apps are using localization at the moment.)

http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=718265#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-718791http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=718791#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-718873http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=718873#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-718974http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=718974#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-719441http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=719441#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-719450http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=719450#respondhttp://osxdaily.com/http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-719456http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/?replytocom=719456#respondhttp://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/#comment-719987

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Al M. says:November 4, 2014 at 4:43 pm

I got a slow down again (1MB/s) this evening (hadnt used for ~5 hours). Went to Preferences>

Security & Privacy> Privacy > Location Services. (click Unlock icon and enter User

password). Weather was using location services. I unchecked it, and presto, speed went back

up to ~20 Mbps. (iPad tested at that speed when the MacBook was at 1Mbps.

Late 2013 MacBook Pro w/Retina display. Yosemite 10.10.

Reply

Kevin says:November 6, 2014 at 8:12 am

Turning the location services off worked like magic. My streaming is back up to full speed

from being unwatchable. Thanks!

Reply

Kevin says:November 6, 2014 at 1:17 pm

Well it worked for about 20 hours now the issue is back.

Reply


Same here, off and on. Weird.


Only a temporary fix for me too. Trying Lulu Machetes idea.

PJ says:November 3, 2014 at 10:59 am

Thanks so much! I was going nuts when this all of a sudden started happening a few weeks ago

(unusual b/c I had upgraded to mavericks well before the probs started). Step 1 didnt fix it but Step 2

seems ot have done the trick! huge relief and a hearty thank you!

Reply

Tony says:November 4, 2014 at 5:30 pm

I have had the problem on a single Wi-Fi network that is authenticated via PEAP (MSCHAPv2) since

the day I upgraded to Yosemite. So far, step 1 has worked.

Reply

Lulu Machete says:November 6, 2014 at 4:35 am

Hi All, I tried every possible fix imaginable, deleting and re-creating accounts, networks, users, kext

utility fix, flushing, clearing, reconfiguring etc. Ultimately what worked was to option click on the wifi

icon, open wireless diagnostics. Ignore the pop up window and go to the Window menu in menu bar

and select Scan. The results are the optimal channels to broadcast your wifi on. Change the

router/modem settings accordingly and voila. Stable connection!!

Reply

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Steve Ferris says:November 6, 2014 at 11:08 pm

Thank you. Thank you. Thank you. I updated to Yosemite yesterday and.Bang, instant headache.

The crazy thing was, I could connect using Chrome, but nothing else. Postbox mail client no go.

Safarinope. Firefoxforget it. I use Adobe CC for my business, so I was going completely nuts, as I

could not sync files, receive or send emails etc etc. I even tried to restore tp Mavericks from my

backup, but I was not even allowed to do that using the install disk. AND my connectivity problem was

not only isolated to WiFi, I went out and brought an Ethernet cable, which

Documents

Fix Wi-Fi Problems in OS X Yosemite.pdf