Is it legal to use logic loops?
No restrictions whatsoever Phil, they are royalty free to do as you wish with them. Unaltered means without any changes, alterations; without any creative addition, as they are now, original, as they came, standalone. Putting them in a different folder is not a creative alteration.
Are Logic Pro Loops Royalty Free?
Logic Pro and MainStage: Using the included royalty-free content in commercial works. ... Except as otherwise provided, all Sample Content included in the Apple Software may be used on a royalty-free basis to create your own original soundtracks for your film, video, and audio projects.