> There is a clock with similar behaviour as the Linux clock: CLOCK_UPTIME_RAW

On Linux, CLOCK_UPTIME_RAW is not adjusted by NTP and it should not be used for a clock using *seconds*. NTP ensures that a clock provides seconds and is not slower or faster.

On macOS, if you want a clock which is incremented while the system is asleep, CLOCK_MONOTONIC sounds like a better choice.

I don't know if time.perf_counter() and CLOCK_MONOTONIC have similar effective resolution on macOS. time.perf_counter() should have a better resolution, but can have a worse accurary, than time.monotonic().