: Click on the Purchases tab (the fourth tab) or your profile icon at the bottom of the sidebar.

If you have previously "purchased" (even for free) GarageBand on any Mac using this same Apple ID, the App Store will pop up a message saying: "Do you want to download the last compatible version?" Download/Yes What if I Haven't Purchased It Before?

Downloading an older version of Garageband on Macbook : r/GarageBand

If you encounter issues during the download or installation process, try the following:

Would you like me to: