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 (or 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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Batch-change the Album Rating for the albums of selected tracks
downloaded 18m 22s ago
Renumber order of selected tracks
downloaded 18m 38s ago
Sort purchased tracks into discrete playlists by name or Apple ID
downloaded 23m 3s ago
Export album-artist pairs to tabbed file
downloaded 27m 33s ago
Use tag data to formulate new file name for selected tracks' files
downloaded 28m 11s ago
Display/export a text file list of chosen tag data in library or playlist