Office for Mac Issues

How to Fix Lagging in Large Microsoft Word Documents on Mac

Tauseeq Magsi Sep 25, 2026 869 views

Question details

A lengthy Microsoft Word document (e.g., 190 pages) is experiencing severe lag on Mac, despite having a relatively small file size.

How to Fix Lagging in Large Microsoft Word Documents on Mac

Product: Microsoft Word
Device & OS: Mac
Scenario: Scrolling, typing, or editing content within a lengthy text document.
Observed behavior: The application becomes unresponsive or stutters significantly during navigation and editing, regardless of whether the file is stored locally or on OneDrive.

Before you start

Before applying structural changes or moving content, duplicate your document in Finder to ensure you have a safe, untouched backup of your work.

Solution 1Recommended

Transfer Content to a Clean Document in Sections

Moving your text to a fresh document can eliminate hidden formatting corruption or broken elements that are bogging down performance.

Often, a document accumulates hidden formatting artifacts or structural corruption over time. By migrating the content manually into a brand-new file, you can strip away the underlying issues causing the lag.

Create a new document

Open Microsoft Word and select 'Blank Document' to start fresh.

Copy content in sections

Go to your lagging document. Instead of copying all 190 pages at once, highlight and copy 20-30 pages at a time using Command + C.

Paste and monitor performance

Paste the copied section into the new document using Command + V. Scroll through the new document to test for lag. Repeat this process until all content is transferred, keeping an eye out for the specific section that triggers the lag.

Transfer Content to a Clean Document in Sections

Isolate the issue: If the lag returns after pasting a specific section, that portion likely contains a corrupted image, broken table, or complex style. Delete it and recreate that specific page manually.

Solution 2

Resolve Track Changes and Disable Add-ins

Background processes like third-party add-ins or a massive history of unresolved tracked changes can heavily drain Word's processing power.

Solution 3

Edit Locally and Optimize Document Structure

Editing directly from cloud storage can cause synchronization delays, and complex document structures can overwhelm the application.

Free Microsoft Office alternative

Experience Lag-Free Editing with WPS Office for Mac

If Microsoft Word continues to struggle with your large documents, WPS Office offers a lightweight, lightning-fast alternative. It handles heavy files effortlessly while maintaining seamless compatibility with your existing work.

1. Download and install: Get WPS Office for Mac from the official website and complete the quick installation process.
2. Open your lagging document: Launch WPS Writer, go to File > Open, and select your large .docx file to instantly experience smoother performance.

Highly optimized for Mac to ensure smooth scrolling and typing in massive documents.Fully compatible with Microsoft Word formats (.docx, .doc), so your formatting stays intact.Lightweight application size that consumes significantly fewer system resources.Completely free to use with a clean, familiar interface that requires no learning curve.

microsoft office alternative - wps office

Frequently Asked Questions

Why does my Word document lag even though the file size is small?

File size isn't the only factor affecting performance. Complex document structures, extensive formatting, corrupted internal styles, or an accumulation of hidden metadata can cause significant lag regardless of the megabyte count.

Does editing a document directly from OneDrive cause lagging on Mac?

Yes, editing directly from cloud storage like OneDrive can introduce synchronization delays, especially on large files. Saving and editing a working copy locally on your Mac's hard drive often resolves this stuttering.

How do I know if an add-in is causing my Word document to slow down?

You can test this by temporarily disabling your active add-ins through the Insert > My Add-ins menu. If the document performance immediately improves after disabling them, an extension is likely the root cause of the lag.

Office App Problems