Currently Being ModeratedJul 27, 2012 10:34 AM (in response to Gorilla Power)
could be some other third party software conflict....
perian is the "video swiss army knife" that provides codecs for a lot of otherwise pain in the *** to use on a mac video formats -- do you have anything else installed that might be messing with the way quicktime is being interpretted? that's what it looks like Perian was doing for me....
Currently Being ModeratedJul 28, 2012 8:54 AM (in response to aolzi)
Same here. MBP 2009 2.56Ghz 4MB RAM 15" It happened when I upgraded to Lion, and mysteriously solved itself... When I installed Mountain Lion, it was fine, then I suppose after updating various software, the choppy/jerky graphics returned. Very annoying.
Currently Being ModeratedJul 28, 2012 11:25 AM (in response to yuri927)
I'm seeing the same thing. The mouse pointer is lagged / choppy using either the trackpad or a wired mouse on my late 2008 model 13" MacBook (4 GB RAM). Overall, the UI is choppy and sputtering. What happened? It's small things like this that can accumulate into a very bad overal user experience. Scrolling is choppy for me in Safari and MS Word.
Currently Being ModeratedJul 28, 2012 12:06 PM (in response to aolzi)
I'm using an Early-2011 13" MBP, which was upgraded from Lion and it runs really smooth. I'm not experiencing any lag issues, with Mission Control or anything.
Could be a 3rd party thing.
Currently Being ModeratedJul 28, 2012 3:27 PM (in response to aolzi)
Brand new MBP Retina, 8GB RAM... Upgraded to Mountain Lion and seeing chopiness compared to Lion when just maimizing/restoring windows. Most notable slowdowns when working in Parallels 7 or VMW Fusion. 2 - 3 second pause when switching in or out of full screen mode in Parallels. Virtuals take longer to boot and react sluggishly compared to Lion.
Confirmed the issue by doing a clean restore back to Lion and reinstalling Parallels. Worked normal. Then, after upgrading a second time to Mountain Lion, seeing the same issues.
Currently Being ModeratedJul 28, 2012 6:46 PM (in response to aolzi)
Same thing with me. While my computer is aging, it has never done anything like this before.
Late 2009 Mac Pro
2x 2.26GHz quad-core Nehalem
GT120 graphics (512MB)
16GB left on system drive (336GB left on my second drive)
Choppy animations mostly in Mission Control, Notification Center, the Dock, and minimizing/restoring windows from time to time. Launchpad is very smooth, as is switching users. At first when I saw this problem I was worried it was time to upgrade my graphics or RAM, but it's slightly reassuring to see that others, even with newer machines, are having these sorts of problems as well.
Currently Being ModeratedJul 28, 2012 9:41 PM (in response to aolzi)
Here is a video of the flickering I'm experiencing. http://youtu.be/NM8RToGZ71A
This is on a brand new iMAC 27inch 3.4GHz i7 8MB L3Cache, 16GB RAM, 2GB AMD Graphics card, Flash Drive with 2TB internal storage drive. This thing is tricked out and extremely fast. I bought it last month. It was running fine until the Mountain Lion upgrade. Ridiculous. I've been a PC user for 15+ years and this is the 'cheap tacky' I would expect from PC. Strangely, it's never happened to me on a PC. PCs get a bad rap. I've actually never had any real problems with PCs. Currently running a 2008 Dell XPS 420 that I've modified and it runs great. It sits right next to my iMAC. Why did I switch to MAC again? Oh yeah...they look cool. But definitely not to waste my entire weekend trying to figure out how to fix software that was obviously released way too early.
Currently Being ModeratedJul 29, 2012 9:10 AM (in response to justinono)
After opening software systematically, I discovered it was AutoCAD causing the issue. So it was 3rd party software and an update after loading Mountain Lion. Once I closed out of AutoCAD, the choppy graphics 'magically' went away. Everything is smooth again. I recommend opening and loading each software program, then closing, and check your graphics. Start with non os x software (i.e. not mail, cal, itunes, etc.). Hope this helps, I'm happy again.
Currently Being ModeratedJul 30, 2012 3:31 AM (in response to justinono)
May I bag you guys who have still problems with the jerking mountain lion to test following system behaviour:
1) Switching the Space via trackpad gesture is jerking in a random way - not always the same "jerkness level"
2) Switching the Space via keyboard shortcut is much faster and does not jerk in any way.
3) Is your configuration a Bluetooth based Trackpad and keyboard?
4) Are you using some trackpad extensions like Jitouch or BetterTouchTool?
5) Have you problems jumping to space 3 via keyboard shortcut (sounds strange, but I am observing this behaviour in my configuration).
Currently Being ModeratedJul 30, 2012 4:30 AM (in response to mlieb)
Not seeing much jerkiness with transition between spaces -- it's there, but is not as bad as jerkiness in other UI elements (like the Dock, though now that I've switched to the 2D Dock it's gotten better, or zooming in and panning with Ctrl+scrolling through Universal Access), screensavers, etc.
1) Not noticeably
2) Not noticeably
3) Yes, both
5) No problems with Ctrl+arrow keys here, but then again spaces don't seem to be much of a problem for me.
Currently Being ModeratedJul 30, 2012 4:44 AM (in response to Gorilla Power)
I uninstalled my trackpad extension JITouch and deactivated the device access in the preferences. The bad effect in the trackpad-driven change-space-animation still remains. I further deletet all the system cachen in /Library/Caches/ and ˜/Library/Caches/ but it didn't help. I disabled every "autostart"-application - but the jerking animation reamains.
I noticed, that within this space-change-animation mountain lion keeps dropping window shadows. In Lion the shadows where dropped after(!) finishing the animation. Is there a possibilty to disable this "show shadows while chaning workspace"-effect?