What authorizing a computer in iTunes actually does

Authorizing a computer in iTunes means telling Apple that this specific device is allowed to play music, movies, and TV shows you've purchased using your Apple ID. When you buy content from the iTunes Store, Apple attaches it to your account. Without authorization, your computer can't play that content — even though you own it.

Think of it as a lock-and-key system. Your Apple ID is the key, and authorization is you handing that key to a specific computer and saying "this one is trusted." You can authorize up to five computers at once under one Apple ID. Once you authorize a device, you don't have to enter your password every single time you want to listen to a song or watch a movie you bought.

This system exists because Apple wants to prevent one person from buying content once and sharing it across dozens of devices. The five-computer limit is their way of allowing reasonable sharing — say, between a work computer, a home computer, and a laptop — while stopping commercial piracy.

Key Takeaways

  • Authorization links your computer to your Apple ID so it can play iTunes purchases without asking for your password every time.
  • You can authorize up to five computers under one Apple ID, and you deauthorize them the same way you authorize them.
  • On a Mac, you authorize through the Account menu in the iTunes app or Music app; on Windows, it's in the Account menu in iTunes.
  • If you've already authorized five computers and need to use a sixth, you must deauthorize one first — you can do this from any authorized computer or from your Apple ID account online.
  • Authorizing a computer is different from signing in: signing in lets you see your account, but authorization is what lets you actually play purchased content.

How to authorize on a Mac

Open the Music app (on macOS Monterey or newer) or the iTunes app (on older versions). At the top of your screen, click Account, then select Authorization, then click Authorize This Computer. A box will appear asking for your Apple ID and password. Type both in and click Authorize.

That's the entire process. Your computer is now authorized. You'll see a confirmation message. From this point forward, any content you've purchased with that Apple ID will play on this computer without asking for your password again.

If you don't see an Account menu at the top, you may be using an older version of macOS or iTunes. Try clicking the iTunes menu itself (the very first menu on the left) and look for Account or Authorize options there instead.

How to authorize on Windows

Open iTunes. At the top left, click Account, then hover over Authorization, then click Authorize This Computer. A window will pop up asking for your Apple ID and password. Enter both and click Authorize.

Windows users sometimes find the Account menu is harder to spot because it's tucked into the menu bar at the very top of the iTunes window. If you can't find it, try right-clicking at the top of the iTunes window — sometimes the menu bar is hidden and right-clicking reveals it.

Once you see the confirmation that your computer is authorized, you're done. Your computer can now play all iTunes purchases linked to that Apple ID.

What to do if you've already authorized five computers

Apple's limit is five computers per Apple ID. If you try to authorize a sixth computer, iTunes will tell you that you've hit the limit and won't let you proceed. You have two choices: deauthorize a computer you no longer use, or deauthorize all computers and start fresh.

To deauthorize a single computer, go to the same Account menu where you authorized it, but this time click Deauthorize This Computer. You'll need to enter your Apple ID and password again. That computer is now removed from your list, and you can authorize a new one.

If you've lost access to one of your five authorized computers — for example, you sold an old laptop and no longer have it — you can deauthorize it remotely. Go to appleid.apple.com in a web browser, sign in with your Apple ID, scroll down to the Devices section, find the computer you want to remove, and click the X next to it. This removes it from your authorized list without needing that computer in front of you.

The difference between authorizing and signing in

Many people confuse these two things because they both involve entering your Apple ID. Signing in means your computer knows who you are — it can show you your account information, your purchase history, and your library. Authorizing means your computer is allowed to actually play the content you bought.

You can be signed in without being authorized, and in that case, you'll see your library but won't be able to play any purchased music or video. You'll get an error message instead. Conversely, you can authorize a computer without signing in, though this is less common. The safest approach is to do both: sign in with your Apple ID, then authorize the computer.

When you need to deauthorize all computers at once

Sometimes you've authorized computers over the years and lost track of which ones are still in your list. Maybe you've upgraded your computer several times, or you're concerned about security. You can deauthorize all five computers at once from your Apple ID account online, and then re-authorize only the ones you actually use.

Go to appleid.apple.com, sign in, and find the Devices section. Look for an option that says Deauthorize All or similar wording (the exact label changes with Apple updates, but it's always in this section). Click it, confirm your choice, and all five slots are now empty. You can then authorize your current computers one by one.

Be aware that you can only deauthorize all computers once per year. If you do it today, you won't be able to do it again until a year from now. This is Apple's way of preventing people from constantly resetting their authorization list to get around the five-computer limit.

What happens if you don't authorize

If you try to play a song or video you purchased on a computer that isn't authorized, iTunes will stop playback and show you an error message. It will offer you the chance to authorize that computer right then — you can click the button, enter your Apple ID, and start playing when ready. So authorization isn't a permanent barrier; it's just a speed bump that requires you to prove ownership once per computer.

Content you've purchased through other means — like songs you imported from CDs, or files you downloaded from other sources — will play on any computer without authorization. The authorization system only applies to iTunes Store purchases.

Frequently Asked Questions

Can I authorize the same Apple ID on my iPhone or iPad?

iPhones and iPads don't use the authorization system the way computers do. They straightforward need to be signed in to the same Apple ID to access your purchases. If you're signed in, you can play your iTunes content. You don't need a separate authorization step on mobile devices.

What if I forgot my Apple ID password?

You'll need to reset it before you can authorize. Go to iforgot.apple.com, enter your Apple ID email, and follow the steps to reset your password. Once you've created a new password, you can use it to authorize your computer.

Do I lose my purchases if I deauthorize a computer?

No. Your purchases stay in your Apple ID account forever. Deauthorizing just means that specific computer can't play them anymore. If you re-authorize that computer later, or authorize a different computer, you can play them again when ready.

Why does iTunes ask me to authorize when I just bought something?

This usually means your computer isn't currently authorized, even if you've signed in. Sign in with your Apple ID, then authorize the computer, and the problem will stop. You should only have to do this once per computer.

Can I authorize a computer that someone else uses?

Yes, but understand what you're doing: anyone using that computer will be able to play all your iTunes purchases without entering a password. Only authorize computers you trust completely, or computers where you're the only user.