'%3e%3cpath%20d='M8%200C12.4183%200%2016%203.58172%2016%208C16%2012.4183%2012.4183%2016%208%2016C3.58172%2016%200%2012.4183%200%208C0%203.58172%203.58172%200%208%200ZM11.6162%204.38379C11.2257%203.99337%2010.5927%203.99338%2010.2021%204.38379L8%206.58594L5.79785%204.38379C5.40732%203.99334%204.77429%203.99329%204.38379%204.38379C3.99331%204.77429%203.99335%205.40733%204.38379%205.79785L6.58594%208L4.38379%2010.2021C3.99348%2010.5927%203.99341%2011.2257%204.38379%2011.6162C4.77426%2012.0066%205.40734%2012.0065%205.79785%2011.6162L8%209.41406L10.2021%2011.6162C10.5927%2012.0066%2011.2257%2012.0067%2011.6162%2011.6162C12.0067%2011.2257%2012.0066%2010.5927%2011.6162%2010.2021L9.41406%208L11.6162%205.79785C12.0066%205.40735%2012.0066%204.77429%2011.6162%204.38379Z'%20fill='%23080E17'%20fill-opacity='0.46'/%3e%3c/g%3e%3cdefs%3e%3cclipPath%20id='clip0_3761_713'%3e%3crect%20width='16'%20height='16'%20fill='white'/%3e%3c/clipPath%3e%3c/defs%3e%3c/svg%3e)
Fix Office 2021 on Mac Showing Microsoft 365 Activation Error
Question details
The user wants to use their newly purchased Office 2021 on a Mac, but the application incorrectly prompts them to activate Microsoft 365 and displays an error stating the previous Office 2019 license is unsupported.
- Product
- Microsoft Office 2021
- Device & OS
- Mac
- Scenario
- Opening Office applications after installing Office 2021 on an iMac that previously had Office 2019 installed.
- Observed behavior
- The application prevents editing and displays the message: 'Activate Microsoft 365 to Create and Edit. Your office 2019 license is not supported with this version of the application.'
Ensure you have the login credentials for the Microsoft account used to purchase and redeem your Office 2021 license, and close all currently running Office applications on your Mac.
Remove the Previous Office 2019 License Files
Clear old license data from your Mac so the system can properly recognize and activate your new Office 2021 license instead of defaulting to the outdated Office 2019 or Microsoft 365 prompts.
When upgrading from an older version of Office, macOS often retains previous licensing files. This causes the newly installed Office 2021 application to mistakenly read the old Office 2019 data, triggering an unsupported license or Microsoft 365 activation error.
Visit the official Microsoft Support website and download the 'License Removal Tool' designed specifically for macOS.
Open the downloaded .pkg file and follow the on-screen prompts to clear out all existing Office license files from your Mac.
Click the Apple menu and select 'Restart' to ensure all temporary cache files related to the old license are completely cleared.
Open Microsoft Word or Excel. When prompted, sign in using the specific Microsoft account that is associated with your Office 2021 purchase to activate the software.
Verify License and Reinstall Office 2021
Confirm that your Microsoft account officially holds the Office 2021 license and perform a clean installation to ensure you aren't accidentally running the Microsoft 365 installer.
Avoid Activation Headaches with WPS Office for Mac
Tired of dealing with complex Microsoft licensing errors, upgrade prompts, or expensive subscriptions? WPS Office provides a lightweight, powerful, and entirely free alternative for your Mac that doesn't require confusing activation steps.
- 1. Download WPS Office: Visit the official WPS website and download the Mac version for free.
- 2. Install on your Mac: Open the downloaded file and drag the WPS Office icon into your Applications folder.
- 3. Open and edit instantly: Launch WPS Office and directly open your existing Microsoft Office files. Start editing immediately without worrying about license conflicts.
Frequently Asked Questions
Why does my Mac say my Office 2019 license is unsupported when I bought Office 2021?
This happens because your Mac is still reading the old Office 2019 license files cached on your system. You need to use the Microsoft License Removal Tool to clear them so the system can recognize your new Office 2021 license.
Can I use Office 2021 on Mac without a Microsoft 365 subscription?
Yes, Office 2021 is a one-time purchase and does not require a subscription. If you are prompted for Microsoft 365, you may have downloaded the wrong installer or have residual Microsoft 365 license files on your Mac.
Will removing my Office license files delete my documents?
No, removing license files only clears the activation data. Your Word documents, Excel spreadsheets, and other personal files will remain completely untouched on your Mac's storage.
Where can I find the correct Office 2021 installer?
You should download the correct installer directly from your Microsoft account. Log in to the 'Services & subscriptions' page online, locate your Office 2021 purchase, and click the install button there.
