Not really. The roots of OS X/MacOS are in NeXTSTEP. It uses a Mach microkernel that originated at CMU, as opposed to the FreeBSD kernel (or anything like it, really).
That said, a bunch of FreeBSD userland code and utilities were ported over to make the OS POSIX-ish.
It's probably easiest to think of a Mac as an amalgam of many different influences and operating behaviors, as opposed to a direct descendant of any one particular lineage.
That said, a bunch of FreeBSD userland code and utilities were ported over to make the OS POSIX-ish.
It's probably easiest to think of a Mac as an amalgam of many different influences and operating behaviors, as opposed to a direct descendant of any one particular lineage.