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Office for Mac Issues

How to Fix Word for Mac Styles List Too Large and Running Slowly

Maira MehtabMaira Mehtab Sep 22, 2026 869 views

Question details

The user is experiencing performance degradation and user interface glitches in Microsoft Word for Mac, specifically noting that the application runs slowly and style names no longer fit properly within the Styles list.

Product
Microsoft Word for Mac
Device & OS
macOS
Scenario
Formatting a document using styles in Word after a recent system or application update.
Observed behavior
Microsoft Word runs unusually slowly, and the style names appear incorrectly sized or too large to fit normally within the Styles list interface.
Before you start

Before making changes or reinstalling applications, ensure you have verified your current macOS and Microsoft Word version numbers, and complete a full backup of your important documents.

Solution 1Recommended

Reinstall Word from the Official Microsoft Website

Switching from the Mac App Store version to the direct download version often resolves persistent UI scaling and performance bugs.

The Mac App Store version of Microsoft Office operates in a slightly different sandbox environment compared to the standalone installer. Reinstalling directly from Microsoft can often resolve update-related graphical glitches like oversized styles lists.

1
Uninstall the App Store version

Open the Applications folder on your Mac in Finder, locate Microsoft Word, and drag the application to the Trash.

2
Download the official installer

Navigate to the official Microsoft Office website in your browser, sign in with the Microsoft account associated with your subscription, and download the Office installer package for Mac.

3
Install and test

Run the downloaded .pkg file, follow the installation prompts, and then open Word to check if the Styles list size and application performance have returned to normal.

Direct Download Advantages: Downloading directly from Microsoft ensures you have the latest standalone patches which may contain specific bug fixes for macOS update conflicts.
Free Microsoft Office alternative

Experience Fast, Glitch-Free Word Processing with WPS Office for Mac

If Microsoft Word continues to suffer from slow performance and UI bugs like oversized Styles lists on your Mac, consider switching to WPS Office. It is a highly optimized, lightweight alternative that provides robust document editing without the sluggishness.

  1. 1. Download WPS Office: Visit the official WPS website and download the macOS installation package.
  2. 2. Install the application: Open the downloaded file and follow the simple on-screen instructions to install it on your Mac.
  3. 3. Open your documents: Launch WPS Writer and open your existing Word documents seamlessly to continue editing with perfect formatting.
Free and lightweight office suite optimized specifically for Mac performanceHighly compatible with Microsoft Word (.docx) formats, retaining all your stylesFamiliar user interface requires no learning curveRuns smoothly and consistently even on older Mac devices
microsoft office alternative - wps office

Frequently Asked Questions

Why is my Word for Mac running so slowly after a recent macOS update?

Major macOS updates can introduce compatibility issues with existing Office installations, or system caches may become corrupted, resulting in sluggish performance and unusual graphical bugs like oversized text in panels.

Will uninstalling Word from my Mac delete my saved documents?

No, uninstalling the Microsoft Word application does not delete your .docx files or personal data. However, it is always recommended to back up your important files before making system changes or reinstalling software.

How can I report this Styles list bug to Microsoft?

You can report the issue directly from within Word by clicking on 'Help' in the top menu bar and selecting 'Feedback'. Note that while Microsoft uses this data to fix bugs, they generally do not respond to individual feedback submissions.