Q: OSX Yosemite Wifi issues

@mamaricci Thank you! Your Keychain Access workaround worked like a charm!

I, have started experiencing a random WIFI disconnect on my late 2012 i-Mac right after installing Yosemite OS several days ago. The rest of my Apple devices, including a mid 2011 Mac Book Air are connecting to my wireless network without a single issue. The problem is exclusive to the i-Mac running Yosemite OS. I do not have frequent WiFi disconnects when browsing or operating computer lightly, however when downloading large files like MPEG - 4 movies or streaming these movies trough my Apple TV via home sharing to my television set then WiFi drops off like crazy. Have to toggle the WiFi "OFF" and "ON" until the movie is downloaded or uploads to Apple TV for playback on my television set. I have tried almost all of suggested "fixes" and nothing works. I can't disconnect Bluetooth simply because all my controls; keyboard, trackpad and mouse are wireless. Some of fixes or remedies as removing Network Configuration and Preference files ended up affecting my system functionality. After applying or removing suggested files I could not connect my i-Mac with the TV via home sharing. Fortunately I did save these files and move them back to the original location to regain previously lost functions. Wegnen, I do have a good filling about your suggestion, however I'm afraid do delete anything from Keychain due to past experiences. I did try to remove my network files which were created at the time of the Yosemite "update" but when promoted to enter my password and again to confirm deletion warning I simply freaked out and canceled the process. At this point I'm considering replacing my three years old Air Port Extreme router with a new one. If that doesn't work I'll move to my Motorola Surf Board cable modem which is also three years old. I'm a little skeptical of performing a such involving task because the rest of my Apple devices are connecting perfectly. Any ideas or suggestions? Thanks for attention.

Can you please share with us some details about your problem and disclose specifics on the fix. Is your WiFi remaining stable to this moment? Which Network files did you have remove? Were you promoted to access a password and warned twice before removing your network files from the Keychain? Thanks.

Same issue. Wireless drops every 2-3 minutes. Tried several of the home remedies that were offered on this and other websites but nothing worked. The only thing that seems to work is turning off the wireless and turning it back on. I use mine for work so this is something I find myself doing 30-40 times a day. I understand that they have released 10.10.1 patch that should address this issue to the developers but not yet GA. I am disappointed that they have not acted faster.

Apple never admits or confirms their own errors publicly. I'm not taking about "washing a dirty laundry" but acknowledging problems and communicating possible progress. They are one of very few company which prefers a silence and uncertainty over an open communication. The company customer support, considering Apple's size, revenue and customer base if compared to any smaller and less successful company is practically none existing. I do own almost all Apple's products because Apple is still the best in product design and hardware quality, however software design, execution and support is shameful. I wish that Tim Cook prioritize and realize that an operating system is a heart of every device they are making. With a current, intermittent WiFi functionality under the newly installed Yosemite OS my i-Mac is unreliable and in some situations useless. Do we demand to much by asking to release properly functioning software or to support loyal customers if occasional issues are created. At this point I'm totally relaying on this discussion forum. Without it I'll be totally abundant with any issues. Just to make a point I and my wife do own; 2012 i-Mac, 2011 Mac Book Air, 2010 Mac Book Air, i-Pad 2, i-Pod 3, i-Pod Mini, i-Pod Mini Retina, i-Pod 5 and an ancient click wheel i-Pod Video. At the moment with an exception of the 2012 i-Mac everything is fully operational, however it's uncertain what a next update/upgrade will bring. Thanks.

Anyone here lose their Wireless USB adapter completely? i would like to try some of these fixes but all I get is "no device!!" Worked great before the upgrade and Apple Help has been well...no HELP!

So the combination that worked for me was setting all of my networks, other than wifi, as inactive. After, I deleted the wifi network restarted, created a new wifi network, opened the advance settings and set the airport connection I was trying to access as the first on my list and deleted a long list of ones I no longer use.

I have tried restarting and it seems to be going strong.

FYI.  I was part of the Yosemite Beta and this morning received and downloaded the OS X Yosemite 10.10.1 seed update from the App Store.  I will post a status in a day or two as to whether this works, but so far no WiFi disruptions all afternoon.  My iMac is fairly old (late 2007) and has other issues, so not a huge risk in my case.

Of course after reinstalling a clean copy of the OS a week ago, and changing my Network Preferences, each of which lasted about two days, the jury's still out on whether this will work or not.  This is a major debacle for Apple, and I would propose writing letters to Apple's headquarters requesting some form of compensation for the lost time and productivity (I must be dreaming.....).

Hope to perhaps hear from others who may have downloaded this beta update.  Thanks.

Quite right, Kevinsky. I've been following this thread for a long time, and have been wondering which distinctive factors have not been investigated here.

IPv.6 seems to be this distinctive factor, and congrats to you for mentioning it!

Though IPv.6 has by no means been implemented all over the globe, it is creepingly coming online. As can be expected from Apple being on the frontier, Yosemite could also be expected to lose functionality/backward compatibility or go awry with older protocols like IPv.4 .

Out here in Europe, I've been alerted to strange website behaviour/server malfunction coinciding with the introduction of Yosemite, but also coinciding with the partial introduction of IPv.6. Coincidence or not?

Moreover, I've been told IPv.6 does not use NAT translation, unlike IPv.4. Also something very new. Take into account a great many people still using older hardware/routers, which are not yet IPv.6 aware,  but still installing Yosemite, we might be getting a picture here.

On top of that, most users experiencing the Lan/WiFi issues discussed here seem to have migrated their settings along with the rest from Mavericks, instead of a Yosemite 'nuke-n-pave'.  Another confirmation of the IPv.6 hypothesis. Their Mavericks network preferences would still exclude IPv.6, probably.

And yet something else, but probably related: lately, the incidence of questions about phantom Macs on the network have risen enormously. I know this is probably a Bonjour issue. But why so many more incidents since the introduction of Yosemite?

Clearly, common sense tells me all this in some way related with the introduction of IPv.6.

Being a bear of little brain, and most of the information in this thread being so far over my head it is halfway to the Andromeda Galaxy, I was just very happy to see this. No betas for me - but hopefully the final fix won't be too far away.

http://www.macrumors.com/2014/11/03/first-yosemite-10-10-1-beta-now-available/

To make myself clearer: you are on Yosemite, using IPv.4 protocol, but you seem to detect IPv.6. In my opinion this is exactly the issue in this thread. In the past, the canon used to be:"switch off IPv.6". Right now, using Yosemite I'd say: when in doubt: switch off IPv.4.

If you use an elderly router, try and switch off IPv.6 anyhow.

Good Luck (coming to you from a fortunate Snow Leopard user).

Yes Kathryn, I've been reading this earlier today. Why do you think

Apple is asking developers to focus on Wi-Fi, Exchange accounts in Mail, and the Notification Center.

Hi you all, to no one in particular, only those affected by the so-called Yosemite WiFi bug: would you test something for me?

Go to System Preferences>Network>Advanced>TCP/IP and see if your IPv.6 has been switched on.

If yes, and you have issues, switch off IPv.6. And post your findings.

If no, switch on IPv.6. And post your findings.

Brand, type and s/n of your router will help too.

Thank you! 

hexdiy wrote:

 

Hi you all, to no one in particular, only those affected by the so-called Yosemite WiFi bug: would you test something for me?

Go to System Preferences>Network>Advanced>TCP/IP and see if your IPv.6 has been switched on.

If yes, and you have issues, switch off IPv.6. And post your findings.

If no, switch on IPv.6. And post your findings.

Brand, type and s/n of your router will help too.

Thank you!

Hi - IPv4 is ON and using DCHP.

There is no option to turn off IPv6 which is set to automatically.