comparing mac os X Darwin and other unixes

[capybara]

4 questions from a os x newbie:
1.does Darwin have any commands that other unix varieties dont?
2. if i go $whereis darwin , what is the reply?
3. is darwin posix compliant , i mean, is it compatible with the other
unix varieties?
4. does darwin have anything similar to apt-get? )

[Feztaa]

[quote author=capybara link=board=11;threadid=4269;start=0#42220 date=1027222573]4. does darwin have anything similar to apt-get? )[/quote]

There's fink. Never used it, but a friend of mine claims that it's a port of apt-get or dpkg or something.

[Ashcrow]

1. Not unless you add them (just as is with most all Unix systems)
2. eh, I am not sure ....
3. Yes
4. fink