If you purchased djay from the Mac App Store:
Simply download djay on your new Mac from the Mac App Store using the same Apple ID that was used for purchasing djay. For more information, follow these instructions.
If you bought djay through the Algoriddim website:
On your old Mac, select “De-Activate” from the djay menu and authenticate with your admin password. This will de-activate the license, and show your license key for you to write down.
On your new Mac, download djay or install it from your CD. Then, activate it with your license key.
Note: To transfer djay’s playlists, cue points, and other data from your old Mac please follow this guide.