Re:Hacker's Guide to Setting Up Your Mac
by TickleSteve on Friday October 03, 2014 @08:06AM
(#8405128)
Oh dear...
Its not even BSD-based...
Its Mach based(http://en.wikipedia.org/wiki/Mach_(kernel)) with a BSD userland. (Read BSD-API). So its "BSD-based" in the same way as Windows is Posix-based (as it too can have a Posix userland API).
Linux != UNIX. BSD != OSX