The actual kernel of XNU (ie. what’s under the hood in macOS, originally by NeXT) is Mach which is a microkernel, and a chunk of FreeBSD is used to provide userland(ish) stuff like POSIX APIs, a UNIX process model on top of Mach, protocol stacks 'n shit.
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Mach/BSD 🤓
The actual kernel of XNU (ie. what’s under the hood in macOS, originally by NeXT) is Mach which is a microkernel, and a chunk of FreeBSD is used to provide userland(ish) stuff like POSIX APIs, a UNIX process model on top of Mach, protocol stacks 'n shit.
but this means they are PowerPC Macs…