Hello Boozer77,
Thanks for using Apple Support Communities.
From your post I understand you want to know if you can commercially distribute music created from smart drum beats in GarageBand. I'd like you to please see the information below on how you may use the loops.
The GarageBand software license agreement says:
"GarageBand Software. You may use the Apple and third party audio loop content (Audio Content), contained in or otherwise included with the Apple Software, on a royalty-free basis, to create your own original music compositions or audio projects. You may broadcast and/or distribute your own music compositions or audio projects that were created using the Audio Content, however, individual audio loops may not be commercially or otherwise distributed on a standalone basis, nor may they be repackaged in whole or in part as audio samples, sound effects or music beds."
So don't worry, you can make commercial music with GarageBand, you just can't distribute the loops as loops.
Using royalty-free loops in GarageBand with commercial work - Apple Support
Take care,
Alex H.