I bought Apple's Mainstage for the loops that come with it. Couldn't find them anywhere in Mainstage but when I opened GarageBand they were all there, and all accessible. Symphony Orchestra. Rhythm Section.
(top right in the Loops Browser) The Mac puts them in Hard Disk/Library/Audio/Apple Loops/ Apple. This GarageBand track uses these Mainstage vocal loops. Put together using ScreenFlow, iMovie and iTunes.
Garageband Jam Pack
For Mainstage Synth Loops go to: For more Mainstage Loops go to: For a similar track using vocal loops go to.