Office Performance Issues

How to Fix Slow or Lagging Microsoft Word on Mac

Maira Mehtab Sep 27, 2026 869 views

Question details

The user is experiencing significant lagging and slow performance when using Microsoft Word on a Mac, which persists even after applying macOS and Office updates.

Product: Microsoft Word
Device & OS: macOS (including Sonoma 14.6.1)
Scenario: Typing, editing, or navigating documents within the Word application on an Apple Mac computer.
Observed behavior: Microsoft Word remains continuously slow and unresponsive, and standard troubleshooting steps like disabling third-party add-ins such as Grammarly have not fully resolved the lag.

Before you start

Ensure that your Mac is plugged in or has sufficient battery life, and check your Activity Monitor to see if other background applications are heavily consuming CPU or memory resources.

Solution 1Recommended

Isolate and Disable Third-Party Add-ins

Disable external extensions and writing tools to determine if a third-party plugin is causing Word to lag.

Third-party software, extensions, and writing assistants (like Grammarly) integrate deeply with Microsoft Word. While helpful, they can heavily consume memory and cause significant typing delays on a Mac.

Open Add-ins Menu

Launch Microsoft Word on your Mac. Navigate to the top menu bar, click on 'Tools', and select 'Templates and Add-ins'.

Disable Active Add-ins

In the Global Templates and Add-ins box, uncheck the boxes next to any active add-ins, especially third-party spelling or grammar checkers.

Restart Microsoft Word

Completely quit Microsoft Word by pressing 'Command + Q'. Reopen the application and test a document to see if the lagging issue is resolved.

Identifying the Culprit: If the lag disappears, re-enable your add-ins one by one, restarting Word each time, to identify exactly which extension is causing the performance drop.

Solution 2

Test Previous Word Versions for macOS Compatibility

Revert to an older, stable version of Microsoft Word if the latest update conflicts with your current macOS version.

Solution 3

Boot Mac in Safe Mode

Start your Mac in Safe Mode to clear temporary system caches and prevent background login items from interfering with Word.

Free Microsoft Office alternative

Experience Fast, Lag-Free Document Editing with WPS Office

If Microsoft Word continues to struggle with performance issues on your Mac, WPS Office offers a highly optimized, lightweight alternative. It requires far fewer system resources, ensuring a fast and responsive typing experience without the frustrating lag.

1. Download the App: Visit the WPS Office website and download the Mac version.
2. Install Seamlessly: Open the downloaded package and drag the WPS Office icon to your Applications folder.
3. Open Your Documents: Right-click your existing .docx files and select 'Open With > WPS Office' to enjoy lag-free editing.

Lightweight installation that runs incredibly fast on macOS without draining system resources.Fully compatible with Microsoft Office formats, including .docx, .doc, and .rtf.Free to use with a familiar, intuitive interface that makes switching effortless.Built-in PDF editing and AI-powered writing tools to enhance your daily productivity.

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Frequently Asked Questions

Why is Microsoft Word suddenly so slow on my Mac?

Sudden slowdowns are typically caused by heavy third-party add-ins like Grammarly, corrupted font caches, overly large document files, or background macOS updates that are temporarily consuming your system's processing power.

Does reinstalling Microsoft Word fix lagging issues?

Reinstalling can help if the core application files have become corrupted. However, if the lag is being caused by an incompatible add-in or a macOS resource conflict, uninstalling and reinstalling won't fix the issue until the specific culprit is disabled.

Can document file size cause Word to lag on macOS?

Yes. Documents that contain numerous high-resolution images, complex tables, embedded objects, or excessive formatting track changes can cause Word to lag heavily. Try compressing the pictures within the document or splitting the file into smaller sections.

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