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Office for Mac Issues

How to Stop Grammar Underlining in Word for Mac

Maira MehtabMaira Mehtab Sep 22, 2026 869 views

Question details

Users experience persistent blue grammar underlines in Word for Mac while typing, even after the general 'Check grammar as you type' option has been cleared.

Product
Microsoft Word for Mac
Device & OS
Mac
Scenario
Typing or editing a document where real-time grammar checks and blue underlines are unwanted.
Observed behavior
Word for Mac continues to display blue grammar underlines. The general grammar-checking toggle fails to fully disable real-time highlighting.
Before you start

Ensure you have saved your current document, as you may need to completely restart Microsoft Word for Mac for the updated grammar settings to take effect.

Solution 1Recommended

Clear Specific Grammar and Style Options

Since the general 'Check grammar as you type' option can sometimes be unreliable on Mac, clearing specific grammar and style rules will force Word to stop the blue underlining.

In some versions of Word for Mac, toggling off the main grammar check preference does not stop real-time blue underlines. To resolve this, you must dive deeper into the grammar settings and disable the individual rules manually.

1
Open Word Preferences

Launch Microsoft Word on your Mac. Click on 'Word' in the top Apple menu bar and select 'Preferences'.

2
Access Spelling & Grammar

In the Preferences window, click on the 'Spelling & Grammar' icon located under the Authoring and Proofing Tools section.

3
Open Grammar Settings

Locate the 'Grammar' section and click the 'Settings...' button next to the writing style dropdown.

4
Clear Unwanted Checks

Scroll through the list and uncheck all the specific grammar and style rules you do not want Word to monitor, then click 'OK'.

5
Restart Microsoft Word

Close the preferences window and completely restart Microsoft Word for Mac to ensure the changes are applied.

Editor Pane Behavior: Even with automatic markup disabled, running a manual Spelling & Grammar check may still flag suspected errors in the Editor pane.
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Frequently Asked Questions

Why does Word for Mac still underline words after I turned off 'Check grammar as you type'?

This is a known reliability issue in some versions of Word for Mac. The general toggle may not fully disable the feature. You must go into the specific Grammar Settings and uncheck the individual grammar and style rules to stop the blue underlines.

How do I turn off the red spelling underlines in Word for Mac?

Go to Word > Preferences > Spelling & Grammar. Under the 'Spelling' section, uncheck the 'Check spelling as you type' option.

Does disabling grammar check also turn off spell check?

No, spelling and grammar checks are controlled independently. Disabling grammar checks will remove the blue underlines, but real-time spelling checks (red underlines) will continue unless you disable them separately.

Will grammar issues still show up in the Editor pane?

Yes. Even if you disable the blue underlines while typing, manually running a Spelling & Grammar review will still use the Editor pane to identify potential issues.