This stay-open applet watches your playing tracks and when an un-rated track starts playing displays a window with a demand it be rated.
While you could easily rate the current track from the iTunes icon in the Dock, this script interrupts you and compels you to do so.
You may prefer the more modern Rating Notify.
This window will pop up when a new song begins playing.
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Title Cap various track tags, featuring editable exceptions lists
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Export selected tracks' data to XML file, import later
downloaded 1h 20m 21s ago
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