On occasion, for one reason or another, iTunes seems to have a link to a file that no longer exists. Your options are then to either hunt for the file manually, one by one, or manually hunt and delete all the dead ones. There is a handy exclamation point icon that will tell you which are broken, but there is no way to filter for these.        Fortunately, thanks to a bit of logical jiggery pokery, you can use Smart Playlists and a cunning quirk of iTunes to do it for you. Herein lies a step-by-step guide to finding all those annoying broken links.        Step 1  Create a new Smart Playlist with a single Artist Does Not Contains rule. Put some garbage into the search field so it will return every artist. Call this playlist "All Music".        Step 2  Create a normal playlist called "Working Music".        Step 3  Create a Smart Playlist with 2 rules. These are:                 Playlist - is - All Music                   Playlist - is not - Working Music         ...