You bought it for Windows too? You know that if you bought it for Mac, you can not run it on Parallels… or is it cracked? If it’s cracked I would not wonder
For me sometimes there was a slight frame drop. Or sometimes for a very short moment it became choppy. For like half a second… that was with Lion too. But it wasn’t the case when I bought it, it occurred only later.
I run it at max resolution too (2560 x 1440) and with maximized settings.
Cleaning my Mac had helped a bit — because even if I deleted like 300 GB, those 300 GBs are still there. They’re just „hidden“ actually, and they will be overwritten once new files are created. So the space is not really there. Which is important, because our computers use this space as virtual space too.
And I hope upgrading some RAM will help as well!
Maybe you’d consider that as well… you can find cheap RAM everywhere on the NET, if it doesn’t work you can still sell it again for a little lower price on eBay!
Good luck
