Bootcamp means running a native installation of Windows (XP/7), there's absolutely no reason why it wouldn't work. Meaning that you have a very real Windows installation on your harddisk, it's not emulated, like in Parallels or VMWare, so it will run like it runs on any PC (since using Bootmcap implies that you have to restart the Mac and boot into Windows). Speaking of emulation, last time I tried Orbiter in Parallels it dd work, but the framerate was awful and there were some annoying textures errors, so the game was pretty much un-playable. But they are doing steady progress with 3D hardware accelerators in both Paralleles and VMWare so who know, maybe in the near future all Mac users can enjoy Orbiter without having to restart the system and use Bootcamp.