Therefore, the correct search should be: “GarageBand 10.1.1 download for Mac OS X 10.11.6”

If you'd like to move forward with your music project, I can help you: for this version Troubleshoot a specific error code you're seeing Suggest lightweight VSTs (plugins) that work on El Capitan

If you have ever downloaded GarageBand on any Mac using your current Apple ID, you can download the compatible version (typically GarageBand 10.1.2 GarageBand '11 v6.0.5 ) directly from the App Store. Apple Discussions Open the App Store on your El Capitan Mac. tab at the top of the window. GarageBand in the list. A prompt will appear stating:

If you have downloaded GarageBand in the past with your current Apple ID, the App Store allows you to redownload the last compatible version for your OS. Open the App Store on your Mac. Click on your profile or the Purchased tab at the top. Locate GarageBand in your list of apps. Click the cloud icon or Install .

If you cannot use the App Store method, older versions of GarageBand, such as GarageBand 6.0.5 (part of iLife '11), are known to run on El Capitan.

| macOS Version | Last Compatible GarageBand Version | |---------------|-------------------------------------| | OS X El Capitan (10.11.0 – 10.11.6) | GarageBand 10.1.1 | | macOS Sierra (10.12) | GarageBand 10.2.0 | | macOS High Sierra (10.13) | GarageBand 10.3.2 | | macOS Mojave (10.14) | GarageBand 10.3.2 | | macOS Catalina (10.15) | GarageBand 10.4.1 | | macOS Big Sur (11.0+) | Latest version (11.x) |

The only legitimate download source is the Mac App Store using the “last compatible version” feature.