[robotic]

> Darwin isn't a "true" *nix, but it's close enough for me.

Yosemite is a registered UNIX 03 product.

http://www.opengroup.org/openbrand/register/

[jdonaldson]

Darwin to me is pretty much the poster child for "unix-like" operating systems: http://en.wikipedia.org/wiki/Darwin_%28operating_system%29

[masklinn]

Hell, OSX has been UNIX03-registered since Leopard/Intel: http://www.opengroup.org/openbrand/register/brand3555.htm