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upgraded to mountain lion and wifi keeps dropping

Upgraded to Mountain lion earlier today and wifi drops every 30 minutes

iMac, OS X Mountain Lion

Posted on Jul 26, 2012 12:49 PM

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Posted on Jul 26, 2012 1:53 PM

I have the exact same issue!

10.8 (12A269) (C2QGX09BDTJW)

1.6 GHz i5

2GB 1333 MHz DDR3

Macbook Air 11"

234 replies

Jul 26, 2012 4:24 PM in response to wifiguru

Yes, my wireless was working before the upgrade.


Here is the Weirdest thing.

I was using firefox and iMessage while downloading an app through the app store.


Even though there was no connectivity on either firefox or iMesage even after trying to restart the apps, The application WAS still downloading in the background.


NOW... I thought... maybe my internet will be restored once the app is done downloading??

However After XCode finished downloading both apps continued to lack connectivity.


The only way I was able to restore connectivity was by turning off my airport and turning it back on.

After about 10 min to 30 min, it dropped off again. It's been happening all day.


Finally, This was on our work cisco routers, I'm testing at home tonight to see if my connection also dropps off at home. It could be a WPA2 thing?


I'm going to need to go back to Lion if this is not fixed soon.

Thanks for your attention,

-Sean Reynolds MS.CS.

Jul 27, 2012 5:05 AM in response to Mr harley

Having the same issue with Mountain Lion update. One weird things I had not noticed before is that when I hover over the WI-FI icon I see contantly : WI-FI Looking for Networks... Loading pages in the new Safari browser also seem to be interrupted with some pages needing reloading to get them to display all elements. I am going to be asking for my money back pretty soon and going back to Lion. I think I need to stop drinking Apple Kool-Aid.

Jul 29, 2012 11:51 AM in response to Mr harley

I'm having the same issue on my iMac (Mid 2007), but mine drops about every 5 minutes or less, yet some times it can stay on for about 30 minutes before dropping again. I also have a Mac Mini (Mid 2011) that is sitting in the same room right next to my iMac (so I can do all of the upgrades on both machines in the same place) and the Mini can stay connected all day long without any trouble at all!


The wireless router is in the same place it's been for almost 5 years and never had any problems until I upgraded the iMac to ML. So, both machines are in the same room, the same distance from the wireless router and yet the iMac keeps losing it's connection (not too mention the Mail app isn't working either unless I close and then re-open it to get new mail) yet the Mac Mini that's sitting right here pretty much right next to the iMac can be online all day long!


Something is definitely wrong with the wireless update or something, at least for the older machines.

Jul 29, 2012 4:44 PM in response to sirhyll

I do not have a Time Capsule, so that doesn't apply to me, yet for some reason I think I figured out at least the problem that I was having - still not sure though.


I had a few older Preference Panes in the System Preferences, one of them being WifiServer (not that - that could've been the culprit) - Yet a few of them were a bit old, so once I cleared those out and also went through my Keychain in Utilities and got rid of all of my very old passwords - The Wi-Fi has only gone down once in about 4+ Hours! That was the longest it stayed online since upgrading so far.


And of course, right when I start to write this reply, it goes down AGAIN. So, so much for all that - but I think it's time we all did a little housekeeping for now until Apple does get this FIXED - at least for those of us that have upgraded older machines.


ML will be the last OS X that my iMac will be able to run...

Jul 31, 2012 6:36 AM in response to Mr harley

Yep I've got same problem too. Wifi just drops for no apparent reason, but happens more when I've been browsing for a while and then do something else in another application (eg Finder)


Had a similar problem after upgrading to OSX Lion, but that was only after iMac coming back from sleep and wifi connection lost. Now it happens anytime!


I tried the same fix I used before (clearing out wifi connection info and re-setting it up) but that only worked for a while.

upgraded to mountain lion and wifi keeps dropping

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