This application will list the file paths of the files in your designated "iTunes Media" folder which are not in iTunes' library. Additionally, you can select a different parent folder and its contents will be compared to the iTunes library. Includes options to Add a selection of found files to iTunes, move them to the Trash, and export to a text file.
Requires Mac OS X 10.6 or later.
Music Folder Files Not Added v1.1 will run on Tiger and Leopard systems.
These files ended up in my (archaic) "iTunes Music" folder on my local drive but are not in iTunes' database. They probably got here because they were added to iTunes when my designated "iTunes Media" folder's external drive was not mounted and iTunes defaulted to this location. After I correctly added them, the original copies remained here.