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L4 is used in the secure element of every modern iPhone. OS X/XNU is based on microkernel designs. Windows is a hybrid.


Are you asserting MacOS X is "based on microkernel designs" just because some versions[0] of Mach are a microkernel, or something else?

[0] https://en.wikipedia.org/wiki/Mach_%28kernel%29


Hrmmm. Digging deeper (and trawling my memory), I'm getting conflicting information:

* https://en.wikipedia.org/wiki/XNU

* https://youtu.be/8RwlEZ88rKM




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