Note: If the App Store does not offer you the older version and demands an OS update, you may need to borrow a friend's Mac running a newer OS, log in with your Apple ID, "purchase" the free app there, and then return to your Catalina Mac to use Method 1.
Go back to your Catalina Mac. GarageBand will now appear in your history, allowing you to follow the steps in Option 1. Option 3: Manual "App Transplant" How can I download GarageBand 10.3.5 on Catalina? garageband catalina 10.15 7 download
: For macOS Catalina 10.15.7, the last fully compatible version of GarageBand is typically version 10.3.5 . Note: If the App Store does not offer
Third-party websites offering "older GarageBand downloads" are generally unsafe, unreliable, and may contain malware. Always use the Apple App Store. Option 3: Manual "App Transplant" How can I