I have a Mac Pro with the HD 4870 (see signature), and I was of course thrilled to hear that Steam was coming to Mac. I downloaded the Orange Box yesterday and have really enjoyed HL2 so far (played a PC demo years ago, and beat Portal last week). My question is, for those of you with similar specs, what settings you're using in-game for Valve games utilizing the Source engine? My frames-per-second are good (stuck on 60 with vertical sync), but HL@ doesn't seem to render smoothly when I swing my view from left to right (or up and down) swiftly. There's often a bit of choppiness to it. It usually happens if I'm turning and strafing at the same time. I'm running on the recommended settings, and I was just wondering if this is something I should just get used to (as in, it's just the way it is in modern PC games) or if there's some setting I can tweak to fix this? Anyway, I also just wanted this to be an area to discuss settings you're using in-game and how your experience has been so far. A lot of us Mac users haven't bothered with "PC" gaming in years, so I feel like a need a refresher course.