Ricardo F added the comment:
I still have this issue on MacOS Mojave 10.14
Python 3.7.2 (default, Dec 27 2018, 07:35:06)
[Clang 10.0.0 (clang-1000.11.45.5)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
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New submission from Ricardo F :
Finally since the release of OSX 10.12 the equivalent from the FreeBSD and
OpenBSD "CLOCK_UPTIME" is available on Darwin under the name "CLOCK_UPTIME_RAW":
CLOCK_UPTIME FreeBSD [1]:
Starts at zero when the kernel boots and increments monoton
