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Fix Word and Excel Read-Only Account Used on Another Device on Mac
Question details
The user is unable to edit documents because Microsoft Word and Excel are locked in read-only mode, displaying an error that the account is being used on another device.
- Product
- Microsoft Office (Word, Excel)
- Device & OS
- macOS
- Scenario
- Activating Microsoft Office on a new MacBook Air when the user has both a perpetual Office license and existing Microsoft 365 subscriptions.
- Observed behavior
- Word and Excel restrict editing capabilities and show an activation error stating the account is in use elsewhere, preventing normal document creation and modification.
Ensure you have the correct login credentials for the Microsoft account used to purchase your specific Office license, and close all Microsoft Office applications before troubleshooting.
Verify License Type and Remove Conflicting Subscriptions
Check your Microsoft account to confirm your exact license type and ensure preinstalled Microsoft 365 trials are not causing activation conflicts.
Having both a perpetual Office license and a Microsoft 365 subscription tied to the same account can confuse the Mac activation process. Identifying your active license is the first step.
Open your web browser and navigate to office.com/myaccount. Sign in with your primary Microsoft email and password.
Navigate to the 'Services & subscriptions' section to verify whether you own a perpetual Office license (like Office Home & Student) or an active Microsoft 365 subscription.
If a Microsoft 365 Family trial was preinstalled on your MacBook Air, open the Applications folder, locate the Microsoft apps, and drag them to the Trash to avoid conflicts with your perpetual license.
Launch Word or Excel, click on 'Sign In' when prompted, and enter the credentials for the account associated with your verified license.
Ensure macOS Compatibility and Manage Device Limits
Verify that your macOS is compatible with your Office version and ensure you haven't exceeded the maximum device limit for your subscription.
Avoid Activation Headaches with WPS Office for Mac
If Microsoft Office activation errors are keeping you from editing your documents, switch to WPS Office. It is a free, lightweight alternative that lets you edit Word and Excel files on your Mac immediately without complicated subscription conflicts.
- 1. Download the Mac installer: Visit the WPS Office website and download the free version optimized for macOS.
- 2. Install the application: Open the downloaded package and drag the WPS Office icon into your Applications folder.
- 3. Open existing files instantly: Launch WPS Office and directly open your existing .docx and .xlsx files to start editing immediately.
Frequently Asked Questions
Why does my Mac say my Office account is being used on another device?
This usually happens if you have reached the maximum number of simultaneous device logins for your Microsoft 365 subscription, or if there is a conflict between a new perpetual license and an old subscription tied to the same account.
How do I fix read-only mode in Word on my MacBook Air?
Read-only mode indicates an activation or licensing failure. To fix it, you need to sign out of the Office application, verify your active license at office.com/myaccount, and sign back in using the exact Microsoft account credentials that hold the license.
Can a preinstalled Microsoft 365 trial interfere with my perpetual Office license?
Yes. If your Mac came with a Microsoft 365 trial and you try to activate a perpetual license (like Office 2021) without removing the trial completely, the software may default to the trial's read-only status once it expires.
