>You are not "allowed" to run System 6 because it is not aware of the >existence of IDE, PCI, AGP, the PowerPC architecture and machine >language, and just about everything else that the computer is based >on. In the latest model of G4 tower, the ATA 100 bus is not >completely supported in OS 9. This is because the time that it >takes to write the software to support hardware is usually >significantly greater than the time it takes to make the hardware >itself. > Actually you *can* run System 6 (and earlier) if you really want to. There's an emulator out there, which is mainly for people who want to run old games (e.g. Dark Castle), which creates a "virtual Mac" on your Mac. I wish I could remember the name - it's pretty cool if you're a Mac veteran and have fond memories of all this old stuff. Paul --