I have been having the same problem ever since I installed Mountain Lion - Snow Leopard was rock solid on my 2011 Macbook Pro with 4GB and HD3000 graphics. I performed a clean install and wiped the disk (Samsung 830 256GB SSD with the latest firmware) before upgrading.
At first I thought it was an issue with Safari, but it seems the system can lock up at any time for no particular reason. It has done it it Firefox too. It will typically hang for about 30 seconds with the beachball going - the dock still works but I can't select anything. The top bar does not work at all. Then everything seems to catch up and all works again until the next time. It seems totally random.
I have reset the permissions, verified the disk, but nothing helps. Really disappointed in Apple.
All I can say at this moment is OS X v10.8.2 improved notably my proceses on my MBP 13" (Dec 2011), and since 1 week ago I have not had more freezes (working full at the same time with Firefox/GNS3/SecureCRT/Adobe/Parallels/iTunes/All MS Office/RealVNC/MSN/iSoftphone/ACAD/so on). I think each one have a different "freeze" case, so it will be better if you could check your system.log and paste what happen here, in order to Apple Technicians (or any delegate) could check your specific problem...someone here (including me) we did it, and in some cases the problem was solved.
I will not doubt, if anything wrong happen in the next days (a new freeze), to post again what my syslog shows.
i'm not sure anymore.
After changing graphic card everything works smoothly again
i havent managed to install Snow Leopard again because i have to format the HDD
but right now i am running 10.8.1 and using Chrome all the time and nothing happens
"Knock on Wood!"
i still believe that it has something to do with ML and overloading Graphic Cards.
Oh ok. Well this is very frustrating for many reasons. 1. Not EVERYONE is having this problem. 2. We don't even know what's causing this yet! 3. Has apple even realized this issue?
I'm worried and angry about this and I haven't even had a freeze since the 10.8.2 upgrade. But, I do realize other people are still having the hard freezes in this new update as well.
i have no idea, Apple should be taking this very seriously.
All i know is that i had an A-OK working Mac Pro and suddenly after installing Mountain Lion my graphic card burnt out.
The phone service mentioned it being a coincidence but a lot of people are having related problems
and i now have to buy a 250$ card just to fix the problem.
I had the same issue and thought it was Google Chrome as well. It actually ended up being a file in my "/Library/Contextual Manu Items" directory which was left over from Google Drive that did not have the correct write permissions and somehow stalled my wifi connection. Once I removed the *.plist file I have not had any issues since.
How did you install the 1.8.2 Combo?
I get a message that (roughly translated) "This volume does not meet the requirements for this update"
Did any of you got a strange message while updating to 1.8.2 in the first place?
My very recent Retina MBP used to run great (It came with ML preinstalled)
I updated to 1.8.2, and after the dowload, restart, update i got a message that the update was NOT correctly installed. It was just a message window with an OK button.
However, even if it was "not correctly installed" I couldn't reapply the update.
From that update everything went to ****.
If i Plug In or Out the external monitor while the computer is running, it will freeze (with graphic glitches) and need a hard reboot.
If I open for example Google Earth ( OpenGL render ) it will crash.
Only Safari works ok, every other browser has random garbled graphics ( Firefox, Chrome, Opera )
+ Other random crashes when opening PgAdmin or Photoshop.
Looks like I'm not alone here. My MacBook Pro (late 2011) already froze twice after installing Mountain Lion 10.8.2. I have also updated to the cumullative patch of last week.. and this still happens. First time I was shutting down the laptop when it froze.
Now it froze right at the login screen upon a cold boot.. so I think definitely this is not due to any running browsers... this is just some weird stuff going on
Here's the video proof
If someone thinks this link earns a new thread, just let me know and I'll create one but it seems like it's the same issue people are complaining about in here..
Just posting an update on my issue here... I'm running Mt. Lion 10.8.2. I'm on a brand new MacBook Pro (Retina) with 2.6 GHz Intel Core i7, 8GB 1600 MHz DDR3.
Many of you are posting about older mac versions and upgrading to Mt. Lion and that being the issue... I'm assuming with this machine right out of the box — the graphics card should handle it just fine.
This is not a Google Chrome issue as they've resolved their browser leak. Not to mention I get freezes when Chrome is nowhere near being open.
Here's what I do know... I had a few files in my download directory, when I would pull up that directory, I had a lot of freezes occuring (requireing a full power off and reboot — totally locked up). I narrowed the freezes down to a single file I had in that directory. I deleted this file via the Terminal. I thought the problem was resolved.
This is my second attempt to post here, the first time I was writing this message and the freeze occured again. I'm really hoping that there's a fix to this soon. Likely, I'll be taking a trip to the Apple store soon.