Sorry, I don't understand the problem.

Can someone please give the result of these commands on Python 3.6 and 3.7 on macOS?

Example on Linux (Fedora 29):

$ python3
>>> import platform, time
>>> platform.platform()
'Linux-4.20.13-200.fc29.x86_64-x86_64-with-fedora-29-Twenty_Nine'
>>> for clock in ('monotonic', 'perf_counter', 'process_time', 'thread_time', 'time'): print(f'clock: {time.get_clock_info(clock)}')
... 
clock: namespace(adjustable=False, implementation='clock_gettime(CLOCK_MONOTONIC)', monotonic=True, resolution=1e-09)
clock: namespace(adjustable=False, implementation='clock_gettime(CLOCK_MONOTONIC)', monotonic=True, resolution=1e-09)
clock: namespace(adjustable=False, implementation='clock_gettime(CLOCK_PROCESS_CPUTIME_ID)', monotonic=True, resolution=1e-09)
clock: namespace(adjustable=False, implementation='clock_gettime(CLOCK_THREAD_CPUTIME_ID)', monotonic=True, resolution=1e-09)
clock: namespace(adjustable=True, implementation='clock_gettime(CLOCK_REALTIME)', monotonic=False, resolution=1e-09)