I have successfully run DirectRT on an Intel-based MacBook Pro 17" by installing Windows XP Home Edition under Apple's Boot Camp Public Beta 1.1. While I don't use Windows for much more than running DirectRT, it seems to run flawlessly on the Mac, and certainly DirectRT runs without a hitch. I tried it out with a few experiments which involve playing 28 fps, 640x480 WMV movies and the movies play smoothly and with excellent timing. Load times are shorter than I've seen on any other computer running DirectRT, in fact.

The only shortcoming I ran into was that I wanted to output codes via TTL to an ERP system, and the MacBook Pro doesn't have a serial or parallel port. Obviously not a shortcoming of DirectRT! USB-to-serial adapters don't work. I will be trying a PCI serial/parallel card when I get an Intel-based Mac tower and will report on whether that works.