Yup, Bryce 4 OSX was out during Apple's OSX beta. B5 OSX almost never crashes with one notable exception: If the textures for an .OBJ import are not in the same folder as the .OBJ, Bryce crashes when it tries to locate them. A couple of annoying (but not fatal) problems are you can't put your computer to sleep while Bryce is running (Bryce turns it off!), that you can't bring the Bryce window forward by clicking in it, it ignores OSX's three button mouse drivers and it runs the CPU at 100% even when it's idle, which can cause thermal problems, especially on laptops. Bryce OSX is Carbonized or a port using apple's OS9 to OSX compiler so it's not native (Cocca). btw - Bryce 5 OSX renders about 10% faster, cycle for cycle, then the PC. HTH; Dan