MacOS – Mac OS X = UNIX?

macmacosunix

Possible Duplicate:
How Unix is Mac OS X?

People always said ubuntu, linux is UNIX based OS, then how about mac os x?
from mac os x terminal i can see most of the unix command are available does it mean mac os also built on UNIX?

Best Answer

Yes.

Indeed 10.5 and 10.6 are Unix (tm) certified which linux is not.

To be more specific, Mac OS X is built on Darwin---a derivative of BSD---running on a Mach microkernel.

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