New in iTunes 12.2
To use Apple Music on your Mac you’ll need to update iTunes to version 12.2. Apple has already released a minor update to it, 12.2.1, which it says fixes a problem for iTunes Match subscribers that could cause tracks to be incorrectly replaced with versions protected by digital rights management. It also fixes an issue faced by former Match subscribers, which requires you to follow a few steps – see http://apple.co/1Jba9S9. We’ve also encountered problems with track number metadata in our existing library tracks being changed, so before using Apple Music, the usual advice about making a backup – in this case, of your whole library, is recommended.