code: def _mount_points(self):
          
          diskutil_ls = subprocess.Popen(
              ["diskutil", "list", "-plist"], stdout=subprocess.PIPE
          )
          disks = _plist_from_popen(diskutil_ls)
  
          return {
              disk["DeviceIdentifier"]: disk.get("MountPoint", None)
              for disk in disks["AllDisksAndPartitions"]
          }
docs: Returns map {volume_id: mount_point}