I've got an older MacBook Pro (2.4 Ghz, 4 GB RAM) and I'm still running 10.6.8 on it. At some point I'm going to have to upgrade to Lion, but before that happens I want to know what I'll lose or gain when it comes to gaming on a Mac. I'd appreciate it if anyone could answer some or all of the following questions: Is it still possible, under Lion, to turn off mouse acceleration? I heard grumblings that it is no longer possible. Can someone confirm or deny that for me? Are the graphics drivers improved under Lion or will I see my frame-rates drop? Does Myth II still work under Lion? How are Steam games like L4D, L4D2, and TF2 under Lion?