Lots of ports of UNIX programs are made to run on Mac OS X or MacOS X with XWindows for X (also by Apple...name's something like that, takes RAM....) See FOTD (fractal of the day!) for some amazing depth-first fractal fun and other reasons to buy your local university's math department pastry for a month of thursdays, hoping they will do an illuminating colloq. And program reccomendations, and ways to go searching for -the good stuff- (or """ you haven't seen before!) Let me know if there's no ports to Mac OS X yet. Fractalman, let us know what to do to encourage a port. I can probably help a bit.