Q: OSX Lion + 2011 iMac 27'' + Video = Freeze

You know what. It froze on my again. 3 times so far. Last time it froze was last Wednesday.. (4 days later) AND I was on Youtube. I'll try the above advise for switching to a different format on Youtube...

****. Off to read the above threads. I'm starting to get worried here. I literally just bought this thing. I hope Apple gets a fix for us.

I'm wondering if it would be a wise move to go back to Snow Leapard for awhile until they get Lion figured out.

I have just turned off sleep in the power settings, have not had it freeze since, unless I manually sleep and then resume...

I prefer not leave my computer on 24/7, but I dont mind doing it for a little while if they can be timely with the fix. Really irritating, I wish they would acknowledge the problem at least.

I am experiencing this error, too - I've only seen it with Flash sites (vimeo/youtube) so far, but haven't had a chance to run iMovie or others yet.

System Specs:

27-inch, Mid 2011

3.4 GHz i7, 16 GB RAM, AMD HD 6970M 2 GB

OS X Lion 10.7

256 GB SSD + 2 TB HDD

Same here, with a totally different model.

Freeze (with the beachball) began in Safari, then extended to Mail, and finally to Finder.

Impossible to even call the "force quit" window.

Impossible to call the "force quit" menu from the app's icon in the dock

Only he mouse was moving - but no reaction to the buttons.

Only solution was to force-reboot with the power button - and no mention in the "crash log".

Config :

iMac (early 2008) 24" 3,06GHz 4GB RAM

Graphic nVidia 8800GS

MacOS 10.7 Lion

Put Activity Monitor in the Dock. You should then be able to use it to force quit instead of the power button.

It is in the dock - but impossible to activate, since the mouse buttons didn't respond.

It's NOT only flash, also Quicktime etc. So people who come with a HTML5 solution or a flash update (Apple also does) don't read, don't listen and don't know what's exactly going on...

I've had this problem 6 times since upgrading to Lion last week.  The mouse moves but the computer won't respond to any mouse clicks or keyboard commands.  Yesterday photobooth was the only app open when it froze.

Did not expect to have to be powering off my new Imac to solve freezes like this -  not very impressed with Apple's testing.

I would suggest you to contact AppleCare for this one. It looks like a Memory dump from the GPU. You might have an issue with the GPU itself.

In my case, and it seems to be similar for everyone else, this problem only started with Lion. It's possible that there's an underlying GPU problem, but it seems more likely that there's something wrong with the drivers provided with Lion.

I think if this where a hardware issue I would be experiencing issues outside of Lion. As it stands Snow Leopard was fine, Windows 7 is fine and if anything would expose a GPU issue its playing The Witcher 2 on high. None the less I have ran apple hardware check and two passes with memtest86, everything checks out fine.

Can you find the same GPU memory dump from your Kernel.log?

AppleCare is a good point of contact to bring informations quickly to Engineering.

Nothing wrong with the GPU, most likely the drivers for the GPU, though.

Well I'm just trying to help, here. He is one of the only one providing Data.

I'll be honest the possibility of a hardware issue does worry me, I had similar symptoms when the graphics card on my old imac died. But then again the machine always had cooling problems.

I'll tell you one thing, given the number of people affected if it is hardware related apple have much bigger problems than their harddrive recall.