OS X 10.8 or later. This application will list the file paths of the files in your designated "iTunes Media" folder which are not in iTunes' track library. Additionally, you can select a different parent folder and its contents will be compared to the iTunes library. Includes options to Filter results, Add a selection of found files to iTunes (Mobile Applications can not be added this way), move them to the Trash, and Export a text file listing the file paths.
The original name of the "iTunes Media" folder was "iTunes Music". That's why this script is named the way it is.
These files are in my "iTunes Media" folder but do not appear as track entries in iTunes. The tracks may have been deleted from iTunes but, for whatever reason, I did not choose to move their files to the Trash.
(via in-app purchase)
Perhaps Also of Interest...
downloaded 11m 15s ago
Batch-change the Album Rating for the albums of selected tracks
downloaded 41m 8s ago
Delete files downloaded and cached by Apple Music
downloaded 46m 21s ago
Exports and then re-imports selected tracks' artwork
downloaded 54m 9s ago
Export files of tracks in two or more playlists to single folder
downloaded 55m 40s ago
Export selected playlists as individual XML or M3U files
downloaded 1h 37m 28s ago
Renumber order of selected tracks