I got a new Mac. How do I move my license?

Open the License section in settings, or "Help" → "Activate License…", and click "Deactivate This Mac", then activate again on your new Mac. For the subscription edition, just sign in with the same email on the new Mac. For the lifetime edition, enter the same serial number on the new Mac. You can also deactivate a device from the "Devices" page in your online account.