O'Brien, This is a AGP G4 tower (running a modified QS 800MHz cpu), which CAN run Tiger, but I have a Digidesign Audiomedia 3 sound card in it which is not recognized. By sticking to Panther I get to use this pro soundcard with an older version of ProTools software at a fraction of the cost of more modern setups :-) But in general, I think there are G3 and G4 users out there whose best choice is still Panther. John --- On Tue, 9/9/08, OBrien <bco at hiwaay.net> wrote: > What Mac do you have that's limited to Panther? > > > . . . . . . . . . . . . . . . . . . . . . . > > O'Brien