OSX clock_gettime() [0] offers CLOCK_MONOTONIC and CLOCK_MONOTONIC_RAW, but not CLOCK_UPTIME, only CLOCK_UPTIME_RAW.

Maybe someone knows why? On FreeBSD it is available [2].

[0]: https://www.manpagez.com/man/3/clock_gettime_nsec_np/ [2]: https://man.freebsd.org/cgi/man.cgi?query=clock_gettime