Q: Wifi freezes Mountain Lion (especially with Safari it seems)

I have a very similar issue, but it's not always coming from sleep.  I don't have transmit and have never used it.  I do sporadically end up with a network beachball since upgrading to 10.8.1.  A few times it has been when waking from sleep.  Other times I'll be playing a game like Diablo 3 and the network will hard lock requiring me to restart the computer.

This is getting to be exceedingly frustrated.  Has anyone found a solution?

Yerp, same issue here. Not using Transmit, never have. Periodically, wifi will freeze up, then other apps - can't load Activity monitor or new apps, can load Terminal but it is no use. Relaunch Finder/ sudo killall Finder does nothering. Have to hard restart. Only since I upgraded to 8.1. Crummy update. Could it be to do with iStat?

I found through some searching that the issue stems from a bug in the energy saving option to put hard disks to sleep whenever possible.  Once I disabled that, I haven't had another issue.

Same issue here. Was using Transmit, but Transmit has never been activated in the status bar. I tried disabling the 'put hard disks to sleep whenever possible' for Battery and Power Adapter in the Energy Save Preferences to see if that is the fix.

OK, so I disabled Transmit in the menu bar (which was causing crashes etc without doubt) and I didn't experience this problem ever again.

It's important to note I also NEVER used Transmit apart from open - make transfers - close.

Last night I made the mistake of falling to sleep when using Transmit (sure I'm not the only one to ever do this, right?) and when I awoke the MacBook had also fallen asleep.

And, with Transmit open, and the Mac having fallen asleep, it again crashed out in the same way, no not connection but all "net" devices appeared to think it should be there, and had to reboot to sort out the mess.

So, in my case at least, it's 100% certain that if I have either Transmit (full application) or Transmit menu bar tool running and my MacBook Pro falls asleep, it will, 100% without fail, freeze up multiple apps, lose the net, and need a reboot.

I'm having this issue on my MacBook Pro, with a clean install of Mountain Lion. I was having it on 10.8.0 and am still seeing it on 10.8.1. From what I gather it only occurs when I leave Trasnmit running. I don't have the Transmit menu bar item running.

I have this problem too.  After I try to wake my macbook pro 15 from a long sleep the wifi search thing seems to freeze in it's attempt to get back on my network.  If I try to open net.pref. that freezes.  If open mail that feezes.  Only thing I can do is a hard restart.  *****! 

Panic (maker of Transmit) tells me this is a bug in OS X bonjour services that they have reported to Apple. It is not fixed in 10.8.1. I would be surprised if it isn't addresssed in 10.8.2.

I too find that if Transmit is not running and the menubar option is not enabled (or if WiFi is disabled), then it doesn't happen.

I did have a few other unrelated hard crashes (no beachball, and in one case the grey screen of death) that made me more concerned about hardware failure so I'm exchanging the machine.

Mine has been hard crashing as well and has also done this weird thing where my Kernal_Task goes up into the 500%. I am starting to wonder if its hardware related too. How are you exchanging your machine? Are you just booking a appointment at the apple store?

I have absoluteley the same symptoms as described several times in this thread.

1) iMac 24' early 2009

2) upgraded to Mountain Lion (meanwhile 10.8.1)

3) does not re-connect to Wifi after waking up; shows rotating ball when moving the mouse over the top right wifi symbol

4) freezes all programs that depend on internet, particularly safari and mail

5) only a hard reset helps

However, i have NOT installed transmit.

What I have done now is to replace the wifi connection with the ethernet connection. This has worked now for 24 hrs. without problems. Seems the root cause is the wifi??

Same issues as bhanne01. Disabling spinning down the hard disks worked for me... under Energy saver. I didnt have Transmit either, so I don't think that is the issue.

Ah Ha! I was having the exact same problems on my MBP (early 2011) - The I use transmit all the time but never had Transmit Disc enabled. I tried all other previous "fixes" to no avail, but disabling "put hard disks to sleep when possible" in my energy saver prefs fixed the problem completely!

Thanks!

iMac with same issue exactly FWIW -- hope they fix it.

Nevermind - it's still happening.

I have an early 2008 imac. Worked great w lion but with mountain lion 8.1 have been having the same problem. The 8.2 update did nothing to fix the problem. Getting very fustrated!!!

Apple please find a fix for us