OS X 10.8 or later. This applet will create new Music track playlists based on each selected entry of a specified tag. That is, create individual playlists for each Artist, Album Artist, Album, Composer (and their "Sort" siblings), Genre, or Year.
A good companion to this applet is Merge-Delete Playlists.
A new playlist will be created for each checkmarked entry and will contain Music tracks--in this case--whose artist tag is the same as the entry. The red-colored entries are already playlists.
Perhaps Also of Interest...
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Renumber order of selected tracks
downloaded 5m 26s ago
Exports and then re-imports selected tracks' artwork
downloaded 6m 49s ago
Add or subtract a user-entered number from each selected track's Plays
downloaded 15m 38s ago
Set the Album Rating for the album of a selected track to full- and half-stars or computed clear-stars
downloaded 31m 35s ago
View/Edit tags of selected track(s) in single window
downloaded 1h 5m 42s ago
Copy selected tracks to multiple playlists