And don't forget Blender, BRL CAD (U.S. Military program, free download), linuxcad (crap last I checked it), etc.
There's a ton of 3d programs out for linux, I think there was even a port of Bryce for a while.
Blender is a daunting program at first, I'll admit, and so was autocad when I learned it. But man, you can do some /cool/ stuff with blender once you learn it.
They make blender for osx as well, everyone ought to go try it out....
Back to the topic though, Macs have long been quite free from the vrii of the pc world. But I think this is about to change.
With more and more 'integration' in the mac os, we get closer and closer to some of the problems they encounter in windows.
For example, the new mail.app has safari built right into it, for those penis enlargement spams you get which are filled with spambot image links (so they can see if you rendered their spam). Just wait until someone realizes they can get javascript to execute applescript, and email that spam through everyone in your address book.
Or, maybe someone will figure out how to hack itunes up so they can download any file off your computer they choose, or maybe even replace files.
The other thing, and this is a meek point, is with increasing internet services running on any computer, you have an increased chance of getting attacked. Take the SSL buffer overrun attacks that apple patched us up for a few months back. Before you installed that patch, if you were running a ssh server (sshd), you could have been b0nked by a simple script. This of course applies to any os.
Bottom line, as we get more 'integrated', we accept a few risks.
Just a possable situation.
