iTunes running slow, solution found via apple help
iTunes running slow, solution found via apple help, 1.5 hours with apple help, deleted thousands of Cache files, then simply created a new iTunes library, named to suit, and then in iTunes File dropdown menu clicked on add to library, found itunes music file (in music on my mac) clicked on it, selected music wanted (chance to prune unwanted tracks & albums lclicked on "open" at bottom of page. Nearly 30,000 "tunes" then copied to the newly created file and wonderful to find iTunes was fully operational! back to full speed, no hint of the beachball! Hope this works for all.