1. import platform

  2. 

  3. 

  4. def on_macos_with_hfs():

  5.     """

  6.     MacOS 10.13 (High Sierra) and lower can use HFS+ as a filesystem.

  7.     HFS+ has a time resolution of only one second which can be too low for

  8.     some of the tests.

  9.     """

  10.     macos_version = platform.mac_ver()[0]

  11.     if macos_version != "":

  12.         parsed_macos_version = tuple(int(x) for x in macos_version.split("."))

  13.         return parsed_macos_version < (10, 14)

  14.     return False
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