One of the biggest repositories of free GarageBand loops can be found at MacLoops.com. Non-paying customers are required to share the website on social media in order to reveal the free download links. Looperman.com offers nearly 60,000 royalty-free GarageBand loops uploaded by other users.
iCompositions.com compiles links to free downloads of GarageBand loops for registered users of the website. SoundTrackLoops.com offers a free download package of its best-selling loops to visitors with a valid email address.
Finally, Apple offers additional sounds, which can be directly downloaded via the GarageBand 10 application. In the GarageBand menu, select Download More Sounds, which will automatically update the library of Apple loops, if possible.