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A comment on The Fiasco microkernel. Parent comment

Re:The Fiasco microkernel by brazzy on Thursday October 11, 2018 @09:01AM (#18193127)
The kernel of macOS is XNU, which is basically a hybrid of Mach (microkernel) and BSD (monolithic Kernel). I guess the implication is that they had to create this hybrid because it would have been too slow otherwise.
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Re:The Fiasco microkernel by kayamon on Friday October 12, 2018 @02:21AM (#18199652)
I suspect you'll find the reason for a large amount of BSD code in macOS is because it allows them to get a lot of stuff for free that they didn't otherwise have to write themselves.
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