Moving your iTunes library to another computer
If you get a new computer, you can transfer your iTunes library by connecting computers or by using a portable hard drive or iPod.
For more information, click the links below to see articles on the Apple Service & Support website.
When you sell or give away a computer, don’t forget to deauthorize it (choose Store > Deauthorize Computer).
Related Topics
Authorizing a computer to play iTunes Store purchases
Saving a copy of your playlists