Manage Your Macs

A license works on 2 Macs at a time. Remove a Mac you no longer have, such as one you've sold or lost, to use the license on another.

Your key is in the email you got after buying, and in ClassicTunes › License… on a Mac that's activated. Lost it? Get it emailed again. A Mac you remove stops syncing when it next checks its license, within a month.