OS X 10.8 or later. This applet can examine the iTunes library and sort audio and video tracks purchased from iTunes into discrete playlists by either the purchaser's name or Apple ID (eg: "Purchased by Jane Smith" or "Purchased by email@example.com") which in turn will be placed in a "Purchaser Playlists" playlist folder.
Free to try in Demo Mode: While in Demo Mode, the number of tracks associated with each Purchaser will be reported but sorting tracks into playlists is disabled. An in-app purchase of a registration code will enable playlist creation.
Tracks must have corresponding local files since purchaser information is stored as metadata. iCloud Music Library/iTunes Match tracks in the cloud and "dead" tracks will be ignored.
To purchase a registration code, download and launch the app. Click "Register..." in its File menu and follow the prompts to purchase a code for $1.99. When your payment is processed, you will be emailed a registration code that will unlock the Demo Mode restriction.
Sort using the purchaser's name or Apple ID.
(via in-app purchase)
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