Hi all, I wanted to give Steam a try on my 2009 octo Mac Pro with ATI HD 4870 so I installed Steam into my Boot Camp partition (Windows Vista 64bit). Steam installed fine so I decided to give Bioshock a try on my Mac to see how it would perform so I downloaded the demo but when I try to launch Bioshock it will show the Bioshock banner then the screen will turn black for about a second and jump back to the desktop. So I tried it in my XP partition in Fusion 2 but this time I hear the sounds but I get a constant black screen. Is there something I'm missing? As far as I can tell I've heard people say that Bioshock won't work on Vista 64bit but I heard others say that it runs fine. As for Fusion, I don't know why it's not working am I suppose to install my Mac drivers from the OS disc (although I don't think it's needed unless you need to use bluetooth and/or the iSight camera, right?).