If you can’t find Apple Loops in Logic Pro or GarageBand for Mac
To fix issues with Apple Loops, reindex the Apple Loops library.
If you move loops from the Apple Loops folder to another location, you may not be able to find your Apple Loops or you may experience other issues. You can reindex your Apple Loops library to try to fix these issues:
Click the Loop Browser button in the toolbar to open the Loop Browser.
Click the pop-up menu at the top of the Loop Browser.
Scroll to the bottom of the menu, then choose Reindex All Loops.