Q: OSX Yosemite Wifi issues

I have been in contact with a senior support person at Apple as some of you have as well, and after a clean install of Yosemite (I was on the Beta version and started experiencing the WiFi issues in the last release of the Beta) that he suggested, everything was ok for about 2 days and then the problem returned.  The problem is on my iMac, which is a late 2007 machine, but yet no problem on my MacBook, also an older machine (2008), and no problem at all using Windows 7 in BootCamp on either machine.

Two days ago, I did what you've done (Wintaru) and went to Network Preferences and changed the name of my network from 'Automatic' to 'Internet', clicked apply, and since then, no disconnects.  Of course, am I confident this will work long term?  Not at all.

This has been quite frustrating, but I can say from my conversation 2 days ago with the senior support person at Apple, he acknowledged the issue and indicated that their engineers are working on it.  As someone indicated in this thread, I'm sure Apple wants to test any fix thoroughly so guessing we won't see an update to Yosemite for at least another couple of weeks.  As far as complicated fixes suggested here, I am not a sophisticated user, and will not mess with other settings- I think we all paid a premium for that expertise from Apple.  Just a shame so many of us are losing productive time....

Thank you everyone for your posts and suggestions.

Yeah I spoke too soon, got maybe an hour out of it before it started going flakey again. Hoping there is a patch soon, this is an awfully expensive brick I'm carrying around

Strange thing, if i download something from a website my mbs goes from 0 to 20 mbs and after the download is finished then drops again. I did a clean install from yosemite to mavericks but now mavericks is suffering from the wifi problems too.

Hello all,

I seemed to have found a solution in another thread about Wi-Fi issues (here: Mavericks and Failed ARP causing network drops!). The solution for that issue seemed to have solved this for multiple users where I work. We were plagued with this issue for a while on multiple computers and I can safely say that the solution has fixed over 20 computers that were having the issue and they haven't had Wi-Fi issues for over a week now.

All you do is type the following into terminal:

sudo sysctl -w net.link.ether.inet.arp_unicast_lim=0

Following that, hit return and type your password. Then reboot and hopefully your issue will be solved.

If you like to go the manual route, edit /etc/sysctl.conf as a root user and add the following to a new line:

net.link.ether.inet.arp_unicast_lim=0

Then save and reboot.

Many thanks to Lunaweb if this works for you.

I am also having problem with all my devices running iOS 8.1, none of them will stay connected to the internet. They will connect, but then when I try to use something that uses internet, like Safari, Snapchat, or Mail, it stops working, and will not connect again. This is really frustrating, which is why i'm glad apple is getting ready to release iOS 8.1.1, and OS X Yosemite 10.10.1. Anyone have suggestions on how to make the iOS devices work properly?

Just thought that I would put my stamp on here as well to say that I too am having issues with WiFI, I'm a photographer and losing business when my connection drops while uploading my images to potential clients! 

Dealing with the same issue here after upgrading. Numerous reports out on the web about users upgrading to Yosemite that are now experiencing issues with Wifi. I lost my Wifi twice just responding to this thread. I know some people have had luck deleting .plist files, most are just fumbling around rebooting routers, etc... The real issue is a software bug in the current OSX release that apple needs to address. I am glad that some are able to fix this with workaround however a user should never have to do tweaks like this to use a basic function (networking) of an operating system after an upgrade.

I hope apple takes this seriously and addresses the issues. My trust in their ability to deliver a quality product is waining... No excuse for this type issue when you own both the hardware and OS.

Make that 3 4 times I got bumped from the internet typing this up.

-Best

I hope apple takes this seriously and addresses the issues. My trust in their ability to deliver a quality product is waining... No excuse for this type issue when you own both the hardware and OS.

Yosemite is a very high quality product. As a matter of fact, IMO it is the best release they have ever produced. I absolutely love it. Is the WI-FI or better yet, Networking Problem, a bummer > Yes it is. But it will be addressed.

Most problems come from upgrading as oppose to clean-installing. Or from clean-installing, followed by a migration. If you want to make absolutely sure that your old account settings aren't causing the evil, go to system preferences and create a new admin account and log in to that. Then check the network again. And if the problem persist, then go ahead and try the fixes posted to many places.

I have been working straight with Yosemite with zero network-drops since about 3 weeks. But I did a 10.10 clean install with zero migration. As in, no copying of old Maverick preferences.

Apple will get this under control and that probably within the next weeks. Have faith and next time an upgrade is released, do 5 minutes of research before hitting that upgrade button. It could save you days of frustration if you aren't a skilled trouble-shooter.

I have now tried besides the various fixes already mentioned

Upgrade over mavericks -- wifi-lan drops.

Erased partition, A clean yosemite install with transfer files from backup --- wifi-lan drops.

Erased partition, A clean yosemite install no transfer --- wifi-lan drops.

Removed bootcamp (because after the upgrade i couldn't update win7 anymore) repartitioned disk, a second clean yosemite install no transfer --- wifi-lan still drops but runs really slow which is odd because the first clean install didn't run slow.

Erased disk, turned off wifi (i found if i leave wifi on it uses the wifi instead of the lan and restores really slow) then restore mavericks from backup and upgrade to yosemite -- this had no problems whatsoever for a whole day until i migrated my files over, all of which is random because my backup of mavericks 10.9.5 also had the wifi issue

The fact that 2 clean installs produced different results sort of points to a script not identifying hardware properly

I read a while back when i first got the issue in 10.9.4 that apple were saying changing your routers wifi security options would solve it, i didn't try it because i have dozens of devices and it's not really a solution as i may not want any security.

I totally agree, I do love it which is why I'm persevering there's no way i can go back now!

my iMac has a clean install and works like a charm boots in 11 secs and reboots in 26

my MBP boots in 40 secs (used to be about 20) and reboots in 2-3 mins (used to be about 40) and takes forever to shut down

Ive also been experiencing issues with the WIFI.  Its been "hanging" and disconnecting/reconnecting intermittently.  Oddly enough, at the same time issues started popping up on the Mac, I started having similar issues with a nearby wireless laptop (not OSX).

Moving the Mac to a wire has solved ALL my issues for now.  But I found it interesting that whatever was going on with the Mac also affected a system in near proximity.  When I have time, Ill see if playing with the network settings can alleviate the issues, if they remain after the forthcoming updates.

I did the following (in this order) after reading through some posts from others and it solved my problems;

KieranN92

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

I just got in touch with an AppleCare representative, you can potentially try resetting the System Management Controller, there is an article here on how to do this, and it's easy and safe Intel-based Macs: Resetting the System Management Controller (SMC) - not sure if this is the solution for everyone, but I have had some success so far, lets wait and see how long it will last!

mamaricci

Re: OSX Yosemite Wifi issues

in response to cagperez

I just tried something, which so far seems to be working. Go in to your Keychain access - System. Find your wireless network - double click. There are two tabs, Attributes & Access Control. Go into the Access Control and check "allow all applications to access this item". Mine was defaulted on confirm before allowing access, which I think was knocking me off every time I tried to do anything.

I'm not sure, but this is the first 10 minute period I haven't been knocked off since upgrading last night. Good luck!

Are you saying this is a broadcast/multicast issue? Fascinating...

Aha!  http://www.macworld.com/article/2843072/apple-reportedly-asks-developers-to-focu s-on-wifi-in-first-yosemite-beta-update.html

So there IS a problem with wifi under Yosemite.  My problem is that my WiFi works at work (Rutgers University), but not at home (but it did under Mavericks).    Oh, I hope there is a fix soon....

Just to be clear.  OP has an issue when preforming an upgrade using the automated tools provided to him.  You then blame the OP for upgrading when they should have taken 5 minutes to review the new OS.  Your advise is that Apple will take care of in in a few weeks, don't worry.  I would settle for Apple confirming that there is a WiFi issue.

Don't berate a user for doing the exact process that Apple provided them to use.  This is an Apple problem and I agree Apple will fix it.