GarageBand has a lot of cool loops and sound effects. If you are a systems administrator, you might be tasked with deploying these sounds and loops so you don’t need to download it onto each computer when GarageBand opens up. Or maybe you just want to have these effects for your own personal movies or songs.
I made a simple script that will download all of this content in .pkg format and (optionally install it). I keep it updated whenever they release new packs of loops.