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Cake day: July 31st, 2023

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  • It’s not. They both expose a POSIX API and userspace, but the underlying architecture is very different. macOS is in part based on the Mach microkernel, and creating a process has a bunch of work related to that.

    Even ignoring that difference, macOS has built-in signature checking that suspends a newly-started process the first time its executable is seen.