Note: Despite the older looking screenshots, this process should work with iTunes 12. Now it’s much easier to find the music you want to listen to. There! Your iTunes music library is now updated with the proper ID3 information. Since the song now has the proper information loaded in the file, you can right-click an individual song or highlight multiple songs, then select “ Get Album Artwork“. If you wish to take things a step further, you may want to fix the album artwork.Once the song is played, the information is updated with the proper song, artist and album information.You may want to make a playlist that contains each file that you fixed and skip through each one. Now the songs are fixed, but for iTunes to adjust to the changes, you must play each file.Once scanning has completed, you can highlight the tracks you wish to save with the new information then click “ Save“.Items that cannot be located will appear in pink on the left side. In some versions of iTunes, a window lets you know that you have to send information about your library to Apple to get album artwork, but that Apple doesn't store that information. In older versions of iTunes : Go to the Advanced menu and click Get Album Artwork.
Open iTunes and sort your music library so that items with missing information are all together. You can manually add artwork to your music and videos on iTunes11 and later.
Download and install MusicBrainz Picard.