How to Transfer Rekordbox MP3 files (Data) from old MAC to New?

You can find the info you are looking for here:

http://forums.pioneerdj.com/entries/20658308-migrating-your-rekordbox-database

@JuanCarlos > You'll need to ensure both computers have EXACTLY the same account name then follow our Migrating Your Rekordbox Library Guide that Ryan has linked above.