What authorizing your computer means and why you need to do it

Authorizing your computer on iTunes means telling Apple that this specific machine is allowed to play music, movies, and other content you've bought from the iTunes Store using your Apple ID. Without authorization, you won't be able to play most of the media you've purchased, even though you own it.

Apple limits each Apple ID to authorize up to five computers at once. This protects against unauthorized sharing — if someone steals your password, they can't instantly play your entire library on dozens of machines. Once you authorize a computer, anyone using that machine can play your purchased content, so treat authorization like giving someone a key to your media.

You only need to authorize once per computer. After that, the authorization stays active until you manually remove it or until you deauthorize all computers at once from your Apple ID settings online.

Key Takeaways

  • Open iTunes, click Account in the menu bar, then select Authorize This Computer and sign in with your Apple ID to authorize in seconds.
  • You can authorize up to five computers per Apple ID, and authorization lasts until you manually remove it.
  • If you've hit your five-computer limit, you must deauthorize an old computer before authorizing a new one.
  • On a Mac with Apple Music or a newer system, use the Music app instead of iTunes, but the process is nearly identical.
  • You can deauthorize all your computers at once from your Apple ID account page online if you've lost track of which machines are authorized.

How to authorize on Windows using iTunes

Open iTunes on your Windows computer. In the menu bar at the top, click Account. A dropdown menu appears with several options. Select Authorize This Computer.

A window opens asking for your Apple ID and password. Type in the email address or phone number associated with your Apple ID, then enter your password. If you use two-factor authentication, you'll see a prompt asking for a verification code — check your phone or another trusted device for the code and type it in.

Click Authorize. iTunes confirms that your computer is now authorized and shows you how many computers you've authorized in total (for example, "2 of 5"). Close the window. You're done — your computer can now play all your purchased content.

How to authorize on Mac using the Music app

On newer Macs running macOS Monterey or later, iTunes has been replaced by the Music app. Open Music from your Applications folder or Launchpad. Click Music in the menu bar at the top left, then select Authorize This Computer.

The same login window appears. Enter your Apple ID credentials and any two-factor authentication code if prompted. Click Authorize, and your Mac is now authorized.

If you're using an older Mac with iTunes still installed, the process is identical to Windows — open iTunes, go to Account, and select Authorize This Computer.

What to do if you've already authorized five computers

Apple's five-computer limit means you can't authorize a sixth machine until you deauthorize one of the existing five. You have two options: deauthorize a specific computer, or deauthorize all computers at once and start fresh.

To deauthorize a single computer, open iTunes or Music on that machine, click Account in the menu bar, and select Deauthorize This Computer. Enter your Apple ID and password. That computer is now removed from your authorized list, and you can authorize a different machine.

If you no longer have access to one of your authorized computers — for example, you sold an old laptop — you can't deauthorize it directly. Instead, go to appleid.apple.com in a web browser, sign in with your Apple ID, scroll to the Devices section, find the computer you want to remove, and click the X next to it. This counts as a deauthorization, and you can then authorize a new computer.

Deauthorizing all computers at once

If you've lost track of which computers are authorized or you want to start completely fresh, you can deauthorize all five at the same time. Go to appleid.apple.com in any web browser and sign in with your Apple ID and password.

Scroll down to the Devices section. You'll see a list of all computers and devices associated with your account. At the bottom of this section, look for the option to Deauthorize All or Remove All Devices (the exact wording varies by region). Click it and confirm.

All five authorization slots are now empty. You can then authorize your current computer immediately. Keep in mind that after you deauthorize all computers, you won't be able to play your purchased iTunes content on any of them until you re-authorize.

Why authorization sometimes fails

If you see an error message when trying to authorize, the most common cause is an incorrect Apple ID or password. Double-check that you're using the email address or phone number tied to your Apple ID, not a different email. If you've forgotten your password, visit iforgot.apple.com to reset it before trying again.

Another reason authorization can fail is if your internet connection drops during the process. Make sure you have a stable connection and try again. If you're behind a corporate firewall or restrictive network, that can also block authorization — try connecting to a different network if possible.

If you see a message saying you've already authorized this computer, it means the authorization is already active. You don't need to do anything — your computer can already play your purchased content.

What happens after you authorize

Once your computer is authorized, you can play any music, movies, TV shows, or audiobooks you've bought from the iTunes Store. You can also download them to your computer for offline playback. Other people using your computer can play this content too, as long as they don't sign out of your Apple ID.

Authorization doesn't expire on its own — it stays active until you manually deauthorize the computer or until you deauthorize all computers from your Apple ID account page. If you sell or give away a computer, deauthorize it first so the new owner can't play your purchased content.

Frequently Asked Questions

Can I authorize the same computer twice?

No. Once a computer is authorized, it stays authorized until you deauthorize it. If you try to authorize it again, iTunes or Music will tell you it's already authorized. You don't need to do anything — it's ready to use.

Do I need to authorize my computer if I only use Apple Music?

No. Apple Music is a streaming service, so you don't need authorization to listen. Authorization only applies to content you've purchased from the iTunes Store. If you use both purchased music and Apple Music, you still only need to authorize once.

What if I forgot which computer is which in my authorized list?

Go to appleid.apple.com, sign in, and look at the Devices section. Each computer is listed with its name and the date it was authorized. If you don't recognize a name, you can click it to see more details, or remove it by clicking the X next to it.

Can I authorize a work computer and a home computer with the same Apple ID?

Yes. You can authorize up to five computers total, regardless of where they are or who uses them. Just make sure you trust everyone who has access to those computers, since they can all play your purchased content once you're signed in.

Do I lose my purchased music if I deauthorize my computer?

The music stays on your computer — deauthorizing just means you won't be able to play it. If you deauthorize and then re-authorize the same computer, you can play it again. If you deauthorize and never re-authorize, the files remain on your hard drive, but you can't open them.