With the new Intel chips, Macs can now run Windows in addition to OSX on the same machine--you just choose which one you want when you start it up. As far as I know they can run Windows as efficiently as any PC. I believe a beta version of the required software is available for installing Windows XP on the newest Macs. I'm guessing that this will be a very nice and convenient way to run both MediaLab and DirectRT on Macs without the klunky VirtualPC interface. We'll see--let us know if you want to try this!!