Fix Office 2021 for Mac Not Activating After macOS Reinstall
Question details
The user cannot activate their purchased perpetual license of Office 2021 for Mac after a system reinstall.
- Product
- Microsoft Office 2021
- Device & OS
- macOS
- Scenario
- Reinstalling macOS and attempting to reinstall and activate a previously purchased Office 2021 suite.
- Observed behavior
- The Microsoft account recognizes the purchase but creates an activation loop, repeatedly prompting the user to download Office 2021 instead of activating the installed software.
Ensure you have your Microsoft account email and password ready, and verify that your Office 2021 purchase is listed under your account's order history. Close all running Office applications before proceeding.
Clear Old License Data using the Microsoft License Removal Tool
Removing hidden, conflicting license files left over from previous installations can break the activation loop.
Often, residual files from previous installations or temporary tokens confuse the Office activation servers, making them ignore your perpetual license.
Navigate to the official Microsoft Support website and download the License Removal Tool for Mac.
Open the downloaded .pkg file and follow the on-screen prompts to install and run the tool, which will automatically locate and delete the problematic license files.
Once the tool finishes removing the license files, click the Apple menu and restart your Mac.
Open Microsoft Word or Excel, click 'Sign In', and enter the credentials for the Microsoft account associated with your Office 2021 purchase.
Perform a Clean Reinstallation of Office 2021
If removing the license files isn't enough, completely uninstalling Office and clearing Library files ensures a fresh start.
Contact Microsoft Support for Backend Activation Help
If local troubleshooting fails, Microsoft Support may need to manually resolve backend account linking issues.
Try WPS Office as a Free and Hassle-Free Alternative
Tired of activation loops and licensing errors? WPS Office is a highly compatible, lightweight, and free productivity suite for Mac. You don't need complex perpetual licenses or subscriptions to view, edit, and save your documents seamlessly.
- 1. Download for Mac: Visit the WPS Office official website and download the macOS version.
- 2. Install WPS Office: Open the downloaded package and drag the WPS Office icon to your Applications folder.
- 3. Open Your Office Files: Launch WPS Office and directly open your existing .docx, .xlsx, or .pptx files to start editing immediately.
Frequently Asked Questions
Will I lose my documents if I use the Microsoft license removal tool?
No, the license removal tool only deletes hidden system activation files. Your personal documents, spreadsheets, and presentations will remain safe on your Mac.
Why does my Microsoft account prompt me to buy a subscription instead of recognizing my Office 2021 purchase?
This typically happens when the system caches an old Microsoft 365 trial or fails to recognize the persistent license token. Clearing the license files usually forces the system to check your account's permanent purchases.
Is my Office 2021 license tied to the Mac hardware or my Microsoft account?
The Office 2021 perpetual license for Mac is securely tied to your Microsoft account. You must sign in with the exact email address used to purchase the software in order to activate it on a reinstalled OS.
Can I open my Office 2021 files in WPS Office if I can't activate Microsoft Office?
Yes, WPS Office fully supports Microsoft Office formats including .docx, .xlsx, and .pptx, allowing you to edit, save, and share your files without needing an active Microsoft license.
