If you have ever downloaded GarageBand in the past using your Apple ID, you can download the last compatible version directly from Apple's servers: Open the on your El Capitan Mac.
However, you can still download a compatible version (typically or 6.0.5 ) using the "Purchased" tab method or official legacy installers. How to Download GarageBand for El Capitan 10.11.6 1. The "Purchased" Tab Method (Most Reliable) garageband mac os x el capitan 10116 download link
Signing into your Apple ID on a newer Mac that supports the current GarageBand. "Buying" the free app so it links to your account. If you have ever downloaded GarageBand in the
If you have never "purchased" GarageBand before, it won't show in your history. You can fix this by: garageband mac os x el capitan 10116 download link