This applet will assist with swapping, copying, and appending data between two user-chosen tags in selected tracks or tracks in the selected playlist:
Swap - swap data between tags, ex: ARTIST<->COMPOSER
Copy - copy data from one to another tag, ex: ARTIST->
Append - append data from one tag to the end of another, ex: ARTIST->COMPOSER - ARTIST
Prepend - prepend data from one tag to the beginning of another, ex: ARTIST->ARTIST - COMPOSER
The latter three actions also provide an option to delete the info from the first tag after the copy. Read Me explains all.
For OS X 10.8 or later only. This update is free for registered users of v4.x.
Select the Action to perform between the two chosen tags in each selected track.
Set the bookmark pointer of selected tracks to 0 seconds
Set current track's start or stop time to current player position
Add or subtract a user-entered number from each selected track's Plays
Set new Last Played/Last Skipped of selected tracks
Set the Plays of selected tracks.
Applet assists with swapping, copying, appending data between track tags