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Old 31st December 2008
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Oliver_H Oliver_H is offline
Real Name: Oliver Herold
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Join Date: May 2008
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There you can read something about it from Robert Watson:

http://lists.freebsd.org/pipermail/f...st/003674.html

Quote:
I'd be a bit cautious about saying XNU is a Mach kernel. XNU is not a
microkernel, but it contains a lot more Mach code than FreeBSD does.
However, XNU contains massive amounts of FreeBSD code, including countless IPC
models, security parts, VFS, network stack, distributed file systems, etc.
Saying that "Mac OS X is just FreeBSD with an Apple GUI" is certainly false on
face value, but it's not correct to say that the kernel isn't in significant
part FreeBSD-derived.
and

http://unix.derkeiler.com/Mailing-Li.../msg00072.html
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