OSX Yosemite Wifi issues

Recently upgraded to Yosemite on my MB Pro 13" Retina, and immediately started experiencing issues with my internet connection not responding despite the WiFi connection itself not dropping out. Only way to get access back was to continually disable and enable my Wifi connection. At the same time I was only seeing my 2.4ghz and 5ghz networks which broadcast SSID sporadically.

Seemed to have solved the issues with a combination of the solutions suggested by KieranN92 - (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!) and mamaricci - (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.)

Network speeds when browsing etc. have improved significantly and no dropouts since doing the above !!!

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 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!

after spending few days of internet connection being dropped down constantly after upgrade to Yosemite I finally found a solution.

Go to Network settings, click Wifi and than Advanced. In Advanced click TCP/IP column at the top. Under configure IPv4 change to manual and change all the settings in IPv4 Address,Subnet mask,Router and you should be all set. I've copied all the info from my perfectly working Macbook running on Snow Leopard. My iMac is running perfectly since I changed all the settings from yesterday. Good luck, it works !!

Edit

Update didn't solve the wifi issues for us. mid 2012 MBP and a 2013 imac - neither have any real WAN access. Sometimes it will allow me to have internet access long enough to load 1/2 web page.

Our wifi router is an ASUS RT-AC87R running in AP mode with a hard-wired link to an Actiontec Verizion Fios router. The ASUS provides the wifi access while the actiontec is the gateway/router.

Why does it say that this was Branched to a new discussion. at the top of the page, yet when I click the link it states that I don't have permission?

Apple Support Community 2013

Maverick Wi-Fi keeps dropping!

I really believe the WiFi drop out is an issue affecting a growing number of people. It is very Apple hardware / OS software - router specific.

Note that the suggested fixes in the above thread have been repeated without success in this Yosemite thread.

With myself, my 2011 Macbook Pro only shows the drop out issue with one router and unfortunately, that is an important location where I cannot change the router. Elsewhere, I have no WiFi issues.

I would like to understand the issue and I would like a fix, but I don't expect one soon.

"Mavericks = 100% perfectly

Yosemite = poor design, low contrast, huge SLOWNESS, wifi does not work.

nuff said"

Some will disagree with your Yosemite assessment.

Some will disagree your Mavericks assessment

Mavericks - worst OS update in memory?

os mavericks can be the worst software ever made?

Same problems with my brand new Mac mini (2014), which came pre-installed with OS X Yosemite. I can't connect to my wifi network. The Mac mini doesn't find my network... My old Mac mini (2012; OS X 10.9.5) and my MacBook Pro (2010; OS X 10.10.1) are connecting to my wifi network without any problems. I've opened a thread in the Mac mini forum:

Mac mini (2014) WiFi Connection Problems

I'm seeking for help.

I'm very disappointed. One of the most important features of a brand new computer isn't working. 😟 😟

in response to SallyBelgium

If you're serious Sally, send me spec details. I am about to spend money on new RAM and SDD to upgrade an old MBP and might be better buying yours.

Regarding SSD's for your Mac(s), exercise a little caution and be aware that Apple has disabled TRIM Support for 3rd party SSD's in Yosemite. Reports are that using enabler tools to get TRIM Support running can result in situations where the machine won't even boot. I installed an SSD on my late 2009 MBP late last spring and it worked flawlessly until I tried loading Yosemite. The problem I encountered...corrupted drive...could have been the result of the disabled TRIM Support or it might have been user error of course. Nonetheless, I'm glad I dropped back to Mavericks and plan on remaining on Mavericks until wifi and other issues, like this SSD thing, are finally resolved.

My WiFi problems on a Mac mini 2014 with Yosemite are solved. The external USB 3 SSD was the cause of the problem. I moved it away from the Mac mini and used a different USB port (that one besides Thunderbolt) - and WiFi works fine now! More here:

Mac mini (2014) WiFi Connection Problems

Interesting to see WiFi diagnostics report a problem with accessing DNS (on my MBP on work 2.4GHz network) as well as WiFi channel contention... as an update to my earlier post I've seen some much longer periods of connectivity (up to 3 hrs) and shorter (fails immediately) with 10.10.1. No (discernable) problems on the home or MiFi networks (still).

Clearing the SMC may or may not have had an effect (ref http://support.apple.com/en-us/ht3964) - still failed after this.

Now trying the awdl switch...

People,

Let's make some noise. No apple employee are reading us here.

I've just wrote my feedback detailing my mac, OS and router. I recommend we all do the same:

https://www.apple.com/feedback/macosx.html

Well, Morten James Carlsen, I'm glad you have a more open line to Apple than we all have.

But you know as well as I do that Discoveryd has replaced mDNSResponder under Yosemite, and that discoveryd going berserk probably means it is trying to find devices in vain or trying to resolve DNSes in vain.

Maybe query DNSServiceResolve. Saying more will possibly violate my NDA.

I have been having frequent (every 30 seconds to a couple minutes at most) dropping of wifi on my Macbook Air with Yosemite since I installed it several months ago. My wife has Mavericks on her laptop and doesn't ever drop wifi. We're both connecting to the same network. I tried every possible fix and workaround I could find on the 118 pages of this thread, including flashing my router yesterday and updating the firmware.

Then I used this method on page 102:

*************************

souko.vueDec 1, 2014 1:42 AM

Re: OSX Yosemite Wifi issuesin response to tomstephens89

Here's another possible solution/workaround:

1. Option + click your wifi and click on Open Wireless Diagnostic

2. Press CMD + 4 to bring up Scan

3. Press Scan Now and it should provide you with the best channels for each 2.4/5Ghz band

4. Go to your router and change your channel

*************************

Apparently, my router was on Channel 6 along with 4 others in the neighborhood. I logged into the router via http://192.168.0.1 and changed the channel to 11, which was suggested as best channel in the left-hand side of the window from the wireless diagnostic scan tool.

I have no idea why the Mavericks laptop is perfectly fine with the router on channel 6 (as well as her iPhone with older iOS software), and my laptop with Yosemite and phone with iOS8 drops connection continuously, but since I've made the change to an unused wireless channel, I have not dropped the wifi signal once. I'm sure this won't help everyone as this problem seems to be multifaceted, but I'm pointing out souko.vue's post in hope that it might help some more of us.

hexdiy wrote:

Also, your theory seems inconsistent with the many/multiple reports in this lengthy thread from people who had just purchased brand new Macs who were experiencing WiFi issues right out of the box.

Ok, Steve626, you are right all the way. Your argument and other incoming reports today have just about thrashed my stupid theory about older Broadcom WiFi hardware causing this here WiFi issue. And letting the latest "autopush" system security update come through as well. Can't help trying...

Though - and this is where it can get confusing- maybe the out-of-the-box machines have some other issues instead. As stated before, we are dealing with a very mixed bag of issues here. For a good part run-of-the-mill networking trouble, I'm sure.

However, as I now am getting to know, there are so many variations of the WiFi (/sometimes combined Bluetooth) chip (the one for your 2010 Air is as I believe the BCM943224PCIEBT2) and related firmware that I will be giving up research except for machines in my very own hands. Just look up your chip, and flash to its latest firmware.

The best advice I will offer right now is to make a rock-solid clone or backup of your current setup, and install Yosemite on an external HDD to try it out. With a clean install, just as Jndupuis1 did. If it runs well, install on your internal and migrate. You'll still have your clone/backup as fallback. Good luck!

kmosx: Before installing Mac OS X 10.2 or later, check firmware

Hello again, hexdiy. Christmas is coming to an end, but New Years is approaching! So I invite all to Pop the Link above and give a Toast! It is apparently obvious that history has a way of repeating itself by default. Not sayin', just sayin'. This is not Apple's first Rodeo. You all will see that when Apple introduced OS X 10.2, OS 9 customers had to make sure their G4 machine"s firmware was updated in order to accept the OS X 10.2 upgrade. steve626 peaked my curiosity and raised an eyebrow as stated in my previous reply. Notice the link is from Apple's User Tip Contribution. Proposal: Is it possible that OS X 10.10.1 Yosemite exceeds the Hardware's Firmware capabilities in Macs 2012 and earlier? What about driver limitations in the OS X itself? Happy New Year! hexdiy! Happy New Year to all. Read and you be the judge. This is not Apple's first Rodeo in dealing with these incompatibility issues. There has to be beyond a reasonable doubt proved before leaping to conclusion as well. Thought this link would be another good source to ponder.