If you search for GarageBand in the Mac App Store today, you will likely be served the latest version (currently version 10.4.x). Apple frequently updates the software with new features and sound packs.
However, the latest versions often require newer operating systems like Big Sur, Monterey, or Ventura.
If you try to download the latest version on Catalina, you will get an error message saying the app is incompatible. This does not mean you can't use GarageBand. It just means you need the version of GarageBand that was built specifically for your OS. Garageband For Catalina 10.15.7 -FREE- Download
If you have never downloaded GarageBand on your Apple ID before, the App Store might only show you the newest version, which requires macOS Big Sur or later. Since you are stuck on 10.15.7, the button may be grayed out.
The Workaround: Apple does not provide direct download links for older versions of GarageBand. However, there is a legitimate workaround: If you search for GarageBand in the Mac
A: Yes, but only if your patcher supports Metal graphics. GarageBand 10.4.x requires a Metal-capable GPU. On unsupported Macs, the app will crash on launch.
GarageBand is free only if you own a compatible Mac — it comes bundled with macOS, but you cannot legally download it separately as a free standalone installer. Before you start your first project, ensure:
If you search for "GarageBand for Catalina 10.15.7 -FREE- Download" on Google, you will see hundreds of scam websites offering .dmg files. Do not download these.
Before you start your first project, ensure: