Mountain lion wifi problems

Does anyone have a fix for this? My 2011 iMac worked fine in Lion before the ML update, but now I get booted off wifi every 15 minutes or so, and I have to manually access Wifi Diagnostics to get it working again.

It can't be a hardware problem, because my wifi is stable when I boot the iMac into Windows 7 with Bootcamp.

It also can't be a router problem, since all my other devices (including a 2010 MBA on ML) work fine on the network.

Please help! My iMac is my primary work computer.

I think I replied to this question somewhere.... but here's my solution. After a couple of years with no problems at all with Snow Leopard, I had endless breaks in Internet contact. These were finally traced to our seven-year-old Netgear "g" type router. Went out and spent about $55 for a new Netgear "n" type N300, and now have NO problems at all. The word from my guru (our son) is that Mountain Lion may be better in many ways, but might have a tighter tolerance for programming variables - perhaps including router signals - and would "fail" more easily than the older Snow Leopard. Anyhow, the new router solved the problem completely. Good luck!

I had the same problem as all these posts. My iPad, iPhone, Samsung wireless connection for my TV, MacBook Pro and printers all connected to my wifi just fine except my Mac Pro with Mountain Lion. It kept dropping every few seconds - VERY Frustrating.

The only thing that worked for me has been to go into my router settings and change the security from WEP to WPA2. I had to enter in my wifi password for all my wireless devices but my wireless on my Mac Pro with Mountain Lion has stayed consistent for over two weeks now. No problems to complain about since. I hope that helps everyone.

Mountain Lion OS X v10.8.1

Verizon Router - Fios

Hi J1H,

Urortunately,

- Many users had reported in forums that WPA2 was not "per se" resolving the issue: it is probably a reminiscent set of parameters that were reset as a side effect of your upgrade.

- Moreover, it is very difficult to admit that my iMAC would not support WEP "de facto": upgrading to WA2 would mean in my case to throw to the bin at least three of my 16 devices (an ipcam, a Hifi extender to stream music, an old win98 PC)

- My mine deception is that by moving to a "one supplier for all stack" paradigm such as Apple, I didn't solve my "father=home system manager" issue to handle the park of machines a home.... :( Back to PCs at the end? Very very disappointed in any case.

Ph.

Well, I may have fixed my problem. I have gone 48 hours without a failure. It looks a like a software incompatibility issue. Since the menu bar froze when Wifi failed. I started there. I looked at two things in particular: growl and transmit (an ftp client). For me, it looks Transmit was the culprit. Although some think it is actually an interaction between growl and transmit. I have deleted it and the other Panic application I use, Coda 2. Problems (cross fingers) seem to be gone.

I believe there are multiple problems with the wifi communication stack on Mountain Lion. If your problems sound like mine, start with growl because it does notifications which is a new feature of Mountain Lion. If you have the 1.2.2 version, you will see it in the bottom row of your system preferences. There is an application tab that will tell you the programs it interfaces with (Adobe Updater, Dropbox, Evernote, Cyberduck, Coda, Transmit, and Firefox for me). Turn it off. You will need to do so on several tabs. See if you see an improvement. Mine was dramatic. I did a little more research and found that Transmit, while technically compatiable with Mountain Lion, had issues with growl. As I said, I deleted it and its sibling. I also updated growl to the 1.4 version. I have gradually turned the remaining programs back on and have had no problems. If you don't have a known bad actor like transmit, you'll have to do it until you find the problem child.

My Mac is back! Good luck and I hope this helps.

After reading Kekernan's post I turned off Growl (and Hiss, which is a helper app that puts Growl notifications in the ML notification center) and I've had my first full day since I upgraded to ML without a wifi disconnect!

Maybe Kekernan is on to something...

I'm quite disappointed in Apple. I bought a brand new MacBook Pro last weekend, and I'm also having this issue with no fix in sight. The wifi drops after a few minutes, and I have to turn it off and back on to get it working for another couple of minutes. I performed the latest software update, I tried all the fixes I could find, and nothing is solving this issue. I can't go back to Lion, and I can't do anything on my router because I don't have access to it.

The only thing that does work? Installing Windows 7 and using that. Come on, Apple. This is no minor issue.

I had problem with the wifi after I upgraded my iMac to mountain lion, and I tried several propsed solution to solve the problem, however, non of them had worked!

Now check this out.... I have changed my router, which was old for a certain degree, and get a new one,,, Now,,, the wifi just works perfectly, and maybe even better!

If your router is old,,, think about getting a new one...

This is an Apple software problem without a doubt and hopefully a fix in a software update will be in the near future.

I am using a Macbook pro mid 2010 and Airport Extreme 4th generation and never had a problem in Snow Leopard

Wireless connection issues started after installing Lion and got progressively worse with Mountain Lion

I have tried every suggested fix to no avail and my wireless connection will drop every time my Mac sleeps and when woken I always have to wait and enter my closed network manually which is highly annoying.

To others out there with the same problem don't rely on help from Apple telephone support as they seem to be a clueless bunch these days with very limited technical expertise.

Come on Apple get it together and own up officially to this major flaw and get it fixed pronto!

Hi Neale121, I am fully inline with you: this is ML sw issue, n doubt. his given said, there is no much chance to get it solve by complaining I te forums. I am quite surprised by the extended time the Engineers of apple are actuall tring to help over the AppleCare phone lines ...but they apparently are 100% disconnected from Apple forums that are getting that reputation of "complaining place only".

The main issue is that AppleCare is moving to denial mode and just tell customers "WEP is finished for OS X, move to WPA". I have a difficulty to admit this and to throw to the bing quite a flew devices that are WEP-dependent., ,

I am currentely doing a new attempt by fixe DHCP address and move away from DHCP.

Router: D-Link DIR-615

I've just resolved my Mountain Lion wifi problem. My problem was of the disconnect-every-few-minutes-particularly-while-streaming variety.

What didn't work: every solution under the sun: changing the MTU setting in Network preferences, setting router to wireless-g, resetting stuff, restarting stuff...

What worked was updating the router's firmware. The router's "check for updates" button doesn't report any updates available, but the D-Link website does.

Well, 10.8.2 was just released. It's given me a bunch of problems completely unrelated to this thread, but there may be a chance that 10.8.2 fixed the wifi problem.

All I know is: I'm using wifi on my 2007 MBP for the first time in over a month, and it actually is working!

I have not tested it extensively with AirTunes, however.

MacBook Pro and Airport Extreme

10.8.2 has now introduced to my Pro the problem 10.8.1 gave me on my Air!

After sleep I get connected but Wi-fi menu has '!' and says no internet connection

Renewing DHCP lease does not work

Tried new location with Open DNS and that worked once

Tried PRAM reset

Any ideas please

Cheers Robert

I'm still having the same problem, even after the latest OS X update and MBP firmware update. Sometimes my wifi will stay on for hours...other times, it disconnects every few minutes. Very inconsistent, and it doesn't affect any other device on my network...just the MacBook Pro. Again, it's fine if I switch over to Windows...

I'm pleased to finally find others describing the same issue I've been having since installing ML. Definitely not pleased that this is still an issue. For the first time, and not the last, I imagine, I'm genuinely angry with Apple.

I stay connected to the wifi network itself but have to run the diagnostic every 2-5 minutes so it can sort itself out and tell me my connection "seems to be working fine", until the next time of course. I've noticed some comments about volume of data having an effect - this is true for me, also. I can surf text-based pages for maybe 10 or 15 minutes between diags, but I need 2 or 3 diags to get through a short YouTube video. Intensely frustrating!

And since upgrading my iPhone to iOS 6, its happening on it, too! Unbelievable! 😠

If I have to go spend money on an Airport Express as a reward for this OS "upgrading" business, I will be most displeased. I loathe Windows machines, but this is not acceptable for the premium I paid for Apple products.