Universal
UPDATED: CD-Text to CD Info v6.1
Universal, for macOS 11 and later only. This applet will attempt to extract the CD-Text information from the selected audio CD in the Music app and apply it to the CD's disc and track tags.
Some commercial CDs and commercial CD burning software (including the Music app) can use CD-Text as a method of including text data on an audio CD. This data can include Artist (Performer), Album, Composer, Track Title, and Genre info. See the Read Me for more information.

Latest version:
- Officially compiled as Universal
- Commensurate improvements for M1 Macs
More information for CD-Text to CD Info v6.1 and download link is here.
UPDATED: List MIAs v6.2
Universal, for macOS 11 and later only. This applet checks your Music or TV library for missing and presumed dead tracks--those tracks that have become disassociated from their file and which are listed with a "!"--and can delete them from the app or create a text file listing these tracks by last known File Path, Song Name, Artist and Album, which you can view using TextEdit.
Also see Super Remove Dead Tracks and Media Folder Files Not Added.

Latest version:
- Officially compiled as Universal
- Commensurate improvements for M1 Macs
More information for List MIAs v6.2 and download link is here.
