code: def mac_ver(release="", versioninfo=("", "", ""), machine=""):
      """Get macOS version information and return it as tuple (release,
      versioninfo, machine) with versioninfo being a tuple (version,
      dev_stage, non_release_version).
  
      Entries which cannot be determined are set to the parameter values
      which default to ''. All tuple entries are strings.
      """
  
      # First try reading the information from an XML file which should
      # always be present
      info = _mac_ver_xml()
      if info is not None:
          return info
  
      # If that also doesn't work return the default values
      return release, versioninfo, machine
  
imports: import collections
  import os
  import re
  import sys
  import functools
  import itertools
label_desc: Use image node_id 11 for calling a global function with example usage: mac_ver(release, versioninfo, machine) and returns: release,  versioninfo,  machine, info