> Kind of. Mach is still running underneath (and a lot of the app APIs
> use it directly) but there is a BSD 'personality' above it which
> (AIUI) is big parts of FreeBSD ported to run on Mach.
Right. Also, to be clear, OS X is not a true microkernel architecture. They
took the "division of responsibilities" from the Mach microkernel design,
but Mach is compiled into the kernel and is not a separate process from the
kernel.
--
Scott Ribe
scott_ribe(at)killerbytes(dot)com
http://www.killerbytes.com/
(303) 722-0567 voice