Sorry to say, it appears that only Bryce 5.5a works correctly under Tiger (4.0 or 4.1). But as I understand it you can load OS9 classic and run 501 from there (although I haven't tried this myself). I have a freind who is an Apple Developer and he told me that Apple is under a lot of pressure to do something about this. So all hope may not be lost ;-) Best; Dan