If you really want a portable version of GarageBand 10.4, do this legally:
Websites like "Zone-Torrent," "FileCR," or "AppNee" frequently advertise "GarageBand 10.4 DMG Cracked." These are dangerous. They often contain: garageband 10.4 dmg
Note: The Sound Library will still need to be re-downloaded on the new Mac, as those files live in a separate system folder ( /Library/Audio/Apple Loops/ ). If you really want a portable version of GarageBand 10