Missing sounds, instruments, and loops in GarageBand 10 or Logic Pro X

This can happen if you have another mounted drive or volume that also has GarageBand 10 or Logic Pro X installed on it. To avoid this, be sure those volumes or drives are unmounted when you install these applications.

Learn how to remove and reinstall Logic or GarageBand:

• Logic Pro X: Troubleshooting basics (see the section titled Reinstall Logic Pro)
• Reinstall GarageBand