When you authorize your Mac or PC, you’re giving it permission to access your apps, audiobooks, books, music, movies, and other content. You can authorize up to 5 computers, which means that you can play your content on 5 different computers. You can authorize a computer only through iTunes on that particular computer. You can't authorize a computer from another computer or from your iPhone, iPad, or iPod touch.
Check your number of authorizations
Click to open iTunes and sign in to your Account Information page, or use these steps:
- Open iTunes.
- If you’re not signed in, sign in with your Apple ID.
- From the menu bar at the top of your computer screen or at the top of the iTunes window, choose Account > View My Account.
If you’re using Windows and can’t see the menu bar, learn how to turn it on.
- Enter your password, then press the Return or Enter key on your keyboard, or click View Account.
On the Account Information page:
Scroll to the Apple ID Summary section. There you’ll see the number of computers that you’ve authorized with your Apple ID. You can’t see the names of those computers. If you haven't authorized 2 or more computers, you won't see this section.
If the number of authorized computers listed is more than what you expect, you might not have deauthorized the computers that you no longer use, gave away, or sold. You need to deauthorize all of your computers and then re-authorize each one that you still use.
If you run out of authorizations
If one of your 5 authorizations is on a computer you don't use much anymore, deauthorize it. If you've sold or given away a computer that used one of your 5 authorizations, you'll need to deauthorize all of your computers and then re-authorize each one that you still use.
If you didn’t deauthorize your computer before you re-installed Windows or upgraded your RAM, hard disk, or other system components, your computer might be using multiple authorizations. Try deauthorizing your computer a few times until it’s no longer authorized, then authorize your computer again, and it will use only one authorization.
About authorizing iOS devices
You don’t need to authorize your iPhone, iPad, or iPod touch. Your iOS devices don’t use your available authorizations.