Click on the "Updates" tab in the sidebar.
Once installed, go to GarageBand > About GarageBand in the top menu bar to confirm you are running version 10.4.8. Why Users Consider This "Better" garageband 1048 better download
Apple patched a vulnerability (CVE-2023-27938) where processing a specially crafted MIDI file could lead to application termination or the execution of unauthorized code. Click on the "Updates" tab in the sidebar