iTunes 10 for Mac: Find iTunes files
By default, all the audio, video, and other files in your iTunes library are stored here:
Depending on how you’ve imported items into iTunes, your library might include items located elsewhere.
Here are ways to locate your iTunes files:
To find out where a file is stored, select the item in iTunes, and choose File > Get Info. The path to the file is shown at the bottom of the Summary pane (the Where section).
To show the file in the Finder, select the item in iTunes, and choose File > Show in Finder.
If a song doesn’t appear in iTunes anymore:
If a song used to appear in iTunes but doesn’t now, it may be because the iTunes Library file was moved from the iTunes folder, or the song was moved from the iTunes folder. Here are ways to make your songs appear in the library again:
In the Finder, drag your iTunes folder to the iTunes window. You will see the songs in your library again. If the iTunes Library file is included, you’ll also see playlists, song ratings, and other information you created.
If that doesn’t work, your songs may be elsewhere on your hard disk. In the Finder, choose File > Find and search for a song by title or artist. Or search for “MP4” to find files downloaded from the iTunes Store or “MP3” to find songs encoded in MP3 format. Drag songs (or folders containing songs) to the iTunes window to add the songs to iTunes again.