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...
downloaded 3m 34s ago
Change file type to make selected AACs bookmarkable
downloaded 6m 28s ago
Export selected playlists as individual XML or M3U files
downloaded 18m 59s ago
Convert selected tracks and replace them with converted versions
downloaded 22m 41s ago
Gather audio tracks whose files contain no artwork metadata
downloaded 27m 14s ago
Perform search-and-replace on text in your choice of tags
downloaded 35m 18s ago
Select iPod tracks in iTunes and add them to iTunes