After successfully installing Office Home 2024 I cannot open The Word, Excel, PPT apps on my MacBook Air.

This usually points to an activation or old-license conflict on the Mac, especially if Office opens but asks for Microsoft 365 instead of recognizing the Office Home 2024 one-time purchase.

Try this in order:

1. Verify the license is attached to the correct Microsoft account.
   • Sign in to Services & subscriptions.
   • Confirm that Office Home 2024 appears there.
   • If the license is not listed, the apps will not activate correctly.
2. Sign in inside an Office app with that same Microsoft account.
   • A one-time purchase for Office 2024 still requires sign-in for activation.
   • If the app says the account has no license, that usually means the wrong account is being used or an older cached license is interfering.
3. Remove old Office license files on the Mac, then reactivate.
   • This is the recommended step when multiple licenses or an incorrect older license is being picked up.
   • It is especially relevant if the Mac previously had Office 2021, Office 2016, or Microsoft 365 installed.
   • After removing the old license files, open Word again and sign in with the Microsoft account that owns Office Home 2024.
4. If older Office apps are still installed, uninstall them before reinstalling Office 2024.
   • Old Office installations can conflict with activation and app launch behavior.
   • After uninstalling, reinstall from the Microsoft account portal or from m365.cloud.microsoft > Apps > Install apps.
5. Update Office after installation.
   • Close all Office apps.
   • Open Finder > Applications > Microsoft AutoUpdate.
   • Install all available updates, then test Word, Excel, or PowerPoint again.
   • For recent macOS license errors such as Unknown Error 0x0 or License Not Found, Microsoft’s resolution is to update Office and ensure macOS is version 12 or later.
6. If the installer downloaded but the apps still do not launch correctly, reinstall from the account portal instead of reopening the existing apps.
   • Exit all Office apps.
   • Go to Services & subscriptions.
   • Locate the Office product and select Install.
   • Complete the installation, then launch Word from Launchpad and sign in to activate.

If the Mac had a previous Office version before Office Home 2024, the most important step is removing the old license files and then signing in again with the account that shows Office Home 2024 under Services & subscriptions.

• Cannot start Office apps after Office activation | Microsoft Support
• Activation
• Download/Install
• Install on a Mac
• Unknown Error 0x0 or License not found error in Microsoft 365 or Office running on macOS | Microsoft Support