How to Repair or Reinstall Microsoft 365 After a Failed Mac Update
Question details
The user needs to resolve an installation error triggered by Microsoft AutoUpdate after a Microsoft 365 update process was unexpectedly interrupted.
- Product
- Microsoft 365
- Device & OS
- Mac
- Scenario
- A Microsoft 365 software update is interrupted or fails to complete during the installation process.
- Observed behavior
- Microsoft AutoUpdate reports a critical installation error and continuously requests that the Office suite be completely reinstalled.
Ensure you have your Microsoft account login credentials handy, as you will need to sign back in to reactivate your subscription after reinstalling the software.
Completely Uninstall and Reinstall Microsoft 365
Performing a clean removal of corrupted installation files before downloading the latest package ensures a conflict-free setup.
When an update is interrupted, partial files are left on the system which can block Microsoft AutoUpdate from resolving the issue itself. A complete uninstallation is the most reliable method to clear these corrupted remnants.
Open Finder, navigate to your Applications folder, and drag all Microsoft 365 apps (Word, Excel, PowerPoint, Outlook) to the Trash.
In Finder, press Command + Shift + G, type '~/Library', and press Return. Look for the 'Containers' and 'Group Containers' folders to remove leftover Microsoft folders (e.g., UBF8T346G9.Office).
Click the Apple menu in the top left corner of your screen and select 'Restart' to clear out temporary system caches.
Log into your Microsoft account on the official website, download the newest Microsoft 365 installer for Mac, and follow the on-screen prompts to reinstall.
Rerun the Installer Over the Existing Version
Running the installation package directly over your current applications can sometimes replace missing files without needing a full uninstallation.
Try WPS Office for a Fast and Reliable Mac Experience
Tired of dealing with heavy installation files, interrupted updates, and AutoUpdate errors? WPS Office offers a free, lightweight, and incredibly fast alternative for Mac users. It installs in seconds, supports native Apple Silicon performance, and lets you manage documents, spreadsheets, and presentations with a familiar interface.
- 1. Download the Mac installer: Click the download button to grab the lightweight WPS Office package designed specifically for macOS.
- 2. Install instantly: Open the downloaded DMG file and simply drag the WPS Office icon into your Applications folder.
- 3. Open existing files: Launch the application and seamlessly open all your existing Word, Excel, or PowerPoint files without losing any formatting.
Frequently Asked Questions
Why do some Excel VBA macros fail after switching from a Windows PC to an M1 MacBook?
While most standard VBA macros run perfectly on macOS, complex scripts can fail if they rely on Windows-specific features that do not exist on Mac. This includes hard-coded Windows directory paths (like C:\), ActiveX controls, and certain Power Pivot functionalities.
Will uninstalling Microsoft 365 delete my saved documents and spreadsheets?
No. Uninstalling the Microsoft 365 software only removes the application files from your Mac. Your personal documents, spreadsheets, and presentations saved locally or stored in OneDrive will remain completely safe and untouched.
How do I fix Microsoft AutoUpdate if it freezes during a download?
If Microsoft AutoUpdate becomes unresponsive, press Command + Option + Esc to open the Force Quit menu, select Microsoft AutoUpdate, and close it. You can then download the latest version of AutoUpdate directly from Microsoft's website and install it manually.
Does Microsoft 365 run natively on Apple Silicon processors?
Yes, Microsoft 365 includes native support for Apple Silicon (M1, M2, and M3 chips). Performing a fresh reinstallation with the latest package ensures you have the universal binary version, providing optimal performance and battery efficiency on newer MacBooks.
