If you are having issues authorizing a Vocaloid 3 or Vocaloid 4 library on Mac OSX (VOCALOID License Manager indicates "Error(2) " message.(Mac).
Please update to the latest Vocaloid License Manager V4.5.0 (link below).
https://www.vocaloid.com/en/support/download/license-manager-mac/
Please also view the link below for further information regarding authorizing.
https://www.vocaloid.com/en/articles/online_activation/