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Syscalls on macOS aren't guaranteed to be stable - Go found out the hard way and in 1.12 they changed to call libSystem.dylib instead.

In general, stable syscall numbers are just a Linux thing. Everyone else uses blessed system libraries

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Yeah, I know MacOS syscalls aren't stable. Interesting point about Go, I hadn't heard about that. Unfortunately I'm a masochist though, and want to avoid libSystem.dylib as much as possible. The only reason I link against it at all is because MacOS requires it for executables to run, I never actually call into it. Figured I'd just update the syscall numbers if/when they change.

You could also do a trick some Windows stuff does - parse syscall indices from said dylib.

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