code: def _get_system_version_tuple():
      """
      Return the macOS system version as a tuple
  
      The return value is safe to use to compare
      two version numbers.
      """
      global _SYSTEM_VERSION_TUPLE
      if _SYSTEM_VERSION_TUPLE is None:
          osx_version = _get_system_version()
          if osx_version:
              try:
                  _SYSTEM_VERSION_TUPLE = tuple(
                      int(i) for i in osx_version.split(".")
                  )
              except ValueError:
                  _SYSTEM_VERSION_TUPLE = ()
  
      return _SYSTEM_VERSION_TUPLE
  
imports: import os
  import re
  import sys
label_desc: Use image node_id 5 for calling a global function with example usage: _get_system_version_tuple() and returns: _SYSTEM_VERSION_TUPLE