I tried 10.2, but my Ti 400 does not go to sleep on its own and forgets that it has a mouse button after a while (I have the trackpad set so I can tap on the pad, but even that doesn't work). Pretty annoying. If anyone knows a fix, I might give it another try. Furthermore, even though I have a gig of memory I experienced slowness with the so praised speed of Jaguar (compared to 10.1). Chris