What authorizing a computer means and why iTunes asks for it

Authorizing a computer for iTunes means telling Apple that this specific device is allowed to play music, audiobooks, and video you've bought from the iTunes Store using your Apple ID. When you authorize a computer, you're linking it to your account so that iTunes knows you own the content and have the right to play it there.

Apple limits each Apple ID to authorize up to five computers at once. This protects against widespread sharing of purchased content — you can play your purchases on five of your own devices, but not on dozens of computers in a library or office. If you try to play iTunes Store content on a computer that isn't authorized, iTunes will ask you to authorize it before the music or video will play.

You only need to authorize once per computer. After that, any content you've bought with that Apple ID will play automatically on that machine. If you sell the computer, give it away, or stop using it, you can deauthorize it remotely from any other authorized computer or from your Apple account settings online.

Key Takeaways

  • Authorizing links a computer to your Apple ID so you can play iTunes Store purchases on that device.
  • You can authorize up to five computers per Apple ID, and authorization happens in the iTunes app with just a few clicks.
  • Once authorized, you don't need to do anything else — your purchases will play automatically on that computer.
  • You can deauthorize a computer remotely if you no longer use it or want to free up one of your five slots.

How to authorize a computer in iTunes on Windows or Mac

Open iTunes on the computer you want to authorize. If you don't have iTunes installed, download it from Apple's website — the process is the same on both Windows and Mac. When iTunes opens, look at the menu bar at the top of the window.

On a Mac, click Account in the menu bar, then select Authorize This Computer. On Windows, click Edit in the menu bar, then go to Preferences, click the Store tab, and click Authorize This Computer. Either way, iTunes will ask you to sign in with your Apple ID and password — use the same Apple ID you used to buy the content you want to play.

After you enter your credentials, iTunes will confirm that the computer is now authorized. You'll see a message saying something like "This computer has been authorized" along with the date. That's it — you're done. Any music, audiobooks, or video you've bought with that Apple ID will now play on this computer without asking for authorization again.

What to do if you've already used all five authorization slots

If you've authorized five computers and try to authorize a sixth, iTunes will tell you that you've reached your limit. You'll need to deauthorize one of the old computers before you can authorize a new one.

The easiest way is to deauthorize remotely through your Apple account online. Go to appleid.apple.com, sign in with your Apple ID, scroll down to the Devices section, and look for the computer you want to remove. Click the X next to its name to deauthorize it. You don't need access to that computer — the deauthorization happens immediately through your account.

If you're at the old computer and want to deauthorize it there instead, open iTunes, go to Account (Mac) or Edit > Preferences > Store (Windows), and click Deauthorize This Computer. You'll need to sign in with your Apple ID one more time. After that, the slot opens up and you can authorize a different computer.

Authorizing a computer for Apple Music instead of iTunes Store purchases

If you use Apple Music (the subscription service) instead of buying individual songs, the authorization process is slightly different depending on which app you're using. On newer Macs running macOS Monterey or later, there is no separate iTunes app — music plays through the Music app instead.

In the Music app on Mac, click Music in the menu bar, then Account, then Authorize This Computer. On Windows, if you're using the Music app from the Microsoft Store, click the three-dot menu button, select Settings, scroll to Authorize, and click Authorize This Computer. The steps are similar, but the menu locations are different because Apple moved music playback to a different app on newer systems.

For Apple Music subscribers, authorization mainly matters if you want to download songs to listen offline. Without authorization, you can still stream music online, but you won't be able to save it to that computer for offline playback. Most people authorize their main computer and maybe a laptop, then stream everywhere else.

What happens if you deauthorize all your computers at once

If you've lost access to all five of your authorized computers — for example, if your old laptop broke and you've replaced several devices — you can reset your authorization count once per year. Go to appleid.apple.com, sign in, find the Devices section, and look for an option to deauthorize all computers. This will immediately free up all five slots so you can start fresh.

Apple allows this reset once every 12 months, so use it only if you genuinely can't access your old computers. If you reset and then realize you still need one of the old machines authorized, you'll have to wait until the 12-month period passes before you can reset again.

Troubleshooting authorization problems

If iTunes says you're already authorized but won't play your purchases, try signing out and back in. Go to Account (Mac) or Edit > Preferences > Store (Windows), click Sign Out, close iTunes completely, reopen it, and sign back in. Sometimes the authorization gets stuck in the cache and signing out clears it.

If you get an error message saying the authorization failed, check that you're using the correct Apple ID — the one you actually used to buy the content. If you bought music with one Apple ID and are trying to play it with a different one, it won't work. You'll need to authorize with the original Apple ID, or the content won't play.

If your internet connection drops during authorization, iTunes may not complete the process. Make sure you have a stable internet connection, then try authorizing again. Authorization requires a connection to Apple's servers, so it won't work offline.

Frequently Asked Questions

Can I authorize the same computer twice with different Apple IDs?

Yes. A single computer can be authorized with up to five different Apple IDs. This is useful if multiple people in a household buy content from the iTunes Store — each person can authorize the shared computer with their own account, and everyone's purchases will play there.

Do I need to authorize a computer to use Apple Music?

Not for streaming. You can stream Apple Music on any device just by signing in. Authorization only matters if you want to download songs for offline listening on that specific computer.

What happens to my authorization if I change my Apple ID password?

Your authorization stays active. Changing your password doesn't deauthorize computers. However, the next time you try to play protected content, iTunes may ask you to sign in again with your new password — just enter it and you're good to go.

Can I authorize a computer I don't own?

Technically yes, but you shouldn't. Authorizing a computer with your Apple ID lets anyone on that machine play all your iTunes purchases. Only authorize computers you control and trust.

How do I know which computers I have authorized?

Go to appleid.apple.com, sign in, and look at the Devices section. You'll see a list of all computers and devices authorized with your Apple ID, including the date each one was authorized.