How to Activate Microsoft Office on a Mac

Word, Excel, PowerPoint and Outlook run natively on macOS, and activation on a Mac works through your Microsoft account rather than a product key typed into each app. Whether you subscribe to Microsoft 365 or bought Office Home 2024 for Mac, this guide walks you through installation, activation and common fixes.

Check Your License Type

• Microsoft 365 Personal or Family – a subscription you activate by signing in. Works on Mac, Windows, iPad and phones.
• Office Home 2024 / Home & Business 2024 – a one-time purchase for one Mac or PC.
• Work or school Microsoft 365 – assigned by your organization; sign in with your work account.

System Requirements

Office for Mac supports the three most recent major versions of macOS. If your Mac runs an older version, update macOS first through System Settings → General → Software Update, or the apps may not install or receive updates.

Step 1: Redeem Your Purchase (Product Key Cards Only)

If you bought a retail card or received a code, go to setup.office.com on your Mac, sign in with your Microsoft account and enter the 25-character code. This links the license to your account. Subscribers who purchased online can skip this step.

Step 2: Download and Install Office

1. Sign in at microsoft365.com with the account that holds your license.
2. Select Install apps and download the installer package.
3. Open the downloaded .pkg file from your Downloads folder.
4. Follow the installer, entering your Mac password when asked.

You can also install individual apps such as Word or Excel from the Mac App Store and sign in afterwards.

Step 3: Activate by Signing In

1. Open Word or any Office app from the Applications folder or Launchpad.
2. When the What’s New window appears, select Get Started, then Sign In.
3. Enter the Microsoft account linked to your subscription or purchase.
4. Choose a theme and select Start Using Word.

To confirm, open the app menu (for example Word → About Word). It should show your license type.

Fixing Common Activation Problems on Mac

“Unlicensed Product” in the Title Bar

Make sure you signed in with the correct account and that your subscription is active. Sign out from the app menu, quit all Office apps, reopen one and sign in again.

Repeated Sign-In Prompts

Open Keychain Access, search for “Microsoft” or “Office,” and remove old Office credential entries, then sign in again. Restarting the Mac afterwards helps.

Old License Conflicts

If you previously used another Office license, Microsoft provides an official License Removal Tool for Mac. Run it, then sign in with your current account to apply the correct license.

Wrong Version Installed

Older versions such as Office 2016 for Mac are out of support. Uninstall them and install the current version from your account.

Managing Devices

Microsoft 365 Personal and Family subscribers can be signed in on up to five devices at once. If you reach the limit, sign out of Office on an unused device from your Microsoft account’s subscription page.

Frequently Asked Questions

Can I use the same Office 2024 license on a Mac and a PC?

No. A one-time purchase covers one device. Microsoft 365 is the better choice for mixed Mac and PC households.

Do I need an internet connection to activate?

Yes, for the initial sign-in. Afterwards, subscriptions check in periodically.

Is Office from the Mac App Store the same?

Yes. It’s the same app, and you activate it by signing in with your Microsoft account.

Conclusion

Activating Office on a Mac comes down to installing the apps and signing in with the right Microsoft account. If you see license errors, sign out and in, clean up Keychain entries or use Microsoft’s License Removal Tool.