Tried the Steam client on my Mac, Steam.app itself is a bit buggy and quite a resource consuming. The UI feels sluggish even on my i7 iMac, too. For the game it

Tried the Steam client on my Mac, Steam.app itself is a bit buggy and quite a resource consuming. The UI feels sluggish even on my i7 iMac, too. For the game itself, Portal works nicely at native resolution at max settings with lower framerate than Windows equivalent on the same machine. I found it surprising that exposé, dashboard, etc. works even in-game. While Magic Mouse works nicely with Portal, I'd rather not to try it on Team Fortress 2 when it's released as it cannot handle simultaneous left/right click.