Choppy/jerky UI in Mountain Lion

I like you guys am also on this same computer as the OP but with 16 gig of Apple build to order ram installed and a 256 gig ssd with the 2 terabyte second hard drive. I'm in utter awe as to how horrible this operating system is running. I did a reinstall this morning of the OS and sadly, it's not a bad install but bad software that is being sent out to paying customers.

I am hopeful 10.8.1 comes out ASAP. And by that I mean yesterday.

I'm having the same problem

Early 2009 24' iMac

2.66 ghz COre 2 duo processor

4 gb ram

NVIDIA GeForce 9400 256 MB

Same problem here with iMAC 2.5 GHz Intel Core i5 4 GB RAM AMD Radeon HD 512

VERY annoying

Wish we could downgrade to Lion untill Apple solved this.

Fingers crossed they do something about it soon...

Mine's not as bad as most people. I don't get a fullscreen flicker, just really laggy/choppy UI animations. But I had the same problems on Snow Leopard (which my MBP came with). Then Lion was an ok upgrade for me...didn't experience any major issues. I've just come to accept that Apple is really fighting for their release timelines now, so the initial release of a product isn't going to be as great as it looks on their WWDC slideshows (read: iPhone 4 antenna-gate).

It's like they never installed Mountain Lion on a Mac before they released it...

Mine's is also not as bad as the most here, but I have a laggy, choppy stuttering UI animations when I change a space or user and in mission control.

I did a clean install, but it doesn't help in my case.

The only thing that I found out is that the UI animations are choppy after wake up only, never after a restart.

My machine: iMac Mid 2011 i5 8 GB RAM AMD Radeon HD 512

i resolved the choppyness (especially the dock hover and space switching animation to the main space) by switching the 3D Dock to the old plain 2D Dock.... it is now perfectly smooth

How did you make the dock 2D? (other than moving it to the left side of the screen)

I did it with the Mountain Tweaker bei Frederik Wiker here

In addition i changed the dock theme from the original to this one

I installed it on my iMac 12.1 21" base model. Didn't help for me.

If history serves correctly...yes 😐.

According to the changelog for the 10.8.1 update here (http://support.apple.com/kb/HT5418?viewlocale=en_US&locale=en_US) there's no explicit statement about any graphics fixes.

I was experiencing the same issue, although the jumpiness of the UI was contained to the dock, notifications bar, spaces and expose. I have just resolved the issue by doing a clean install, although it took 4 and a half hours for 664.38Gb from a WD 1TB passport formatted for time machine, it was well worth it as it has completely fixed the issue! I recommend doing it.

i have this issue, im thinking of going ot the apple store, i dont think its right that some of us have htis issue and most dont.

i have a late 2011 15inch macbook pro base model, upgraded with 16gb ram and 256gb ssd.

anyone have any update to hsare on this? anyone solve it? for me it cant be 3rd party related, iv clean installed several times, even went to the trouble to make 2 partitions today and do a clean install of lion on one, and mountain lion on the other to compare. not much difference.

I've tried 10.8.2. I have a 2.4GHz macbook white with shared 256mb 320M Graphics and 2GB ram. Haven't upgraded yet. Did a full install on a 16 GB sandisk cruzer blade usb and booted from it. Wow! It lags. Also NO VOLUME CONTROL. Glad I haven't upgraded yet.😁 I boot ubuntu 10.04.1LTS from a usb on this macbook as well. Mountain Lion is a Waste of time and money. Way to go apple!!!