For macOS 10.15 and later only. This script will export then re-import the artwork data of the selected tracks obliging the Music app to embed the artwork in the track's file's meta-data.
For best results, use with an album's worth of tracks--or so--at a time. Music may be obliged to perform a number of background tasks when applying image data and may prevent the script from proceeding if a large amount of data is involved.
- Additional accommodations for macOS 11 Big Sur