Office for Mac Issues

How to Fix Microsoft Office Apps Slow or Laggy on Mac

Guest Writer Oct 9, 2026 868 views

Question details

The user is experiencing significant lag, freezing, and slow launch times when using Microsoft Office applications on a Mac.

How to Fix Microsoft Office Apps Running Slow or Lagging on Mac

Product: Microsoft 365 (Office for Mac)
Device & OS: macOS
Scenario: Opening or working within Microsoft Word, Excel, or PowerPoint applications.
Observed behavior: The applications suffer from the spinning wait cursor (beachball), lag during operation, or fail to launch promptly despite being fully updated.

Before you start

Save any open documents and ensure your Mac is connected to the internet to check for available software updates.

Solution 1Recommended

Free Up System Resources Using Activity Monitor

Close resource-heavy background applications to give Microsoft Office sufficient CPU and memory to run smoothly.

Microsoft Office apps can become laggy if other applications are consuming too much CPU or memory. Using the built-in Activity Monitor helps identify and close these bottlenecks.

Open Activity Monitor

Navigate to your Applications folder, open the Utilities folder, and double-click on 'Activity Monitor'.

Identify Resource-Heavy Apps

Click on the 'CPU' or 'Memory' tabs at the top to sort processes by their usage. Look for background utilities or apps taking up an excessive percentage.

Close Unnecessary Processes

Select the application you want to close and click the 'X' button at the top of the Activity Monitor window, then select 'Force Quit'.

Free Up System Resources Using Activity Monitor

Warning: Do not force quit essential macOS system processes, as this may cause your computer to crash or behave unexpectedly.

Solution 2

Check and Correct Default File Associations

Prevent conflicts by ensuring Office files open directly with Microsoft apps rather than Apple native apps like Pages.

Solution 3

Update macOS and Microsoft 365

Ensure you are running the latest software versions to resolve known performance bugs and compatibility issues.

Free Microsoft Office alternative

Switch to WPS Office for a Faster, Lighter Mac Experience

If Microsoft Office continues to lag or drain your Mac's resources, consider trying WPS Office. It is a highly optimized, lightweight productivity suite that runs smoothly on macOS while maintaining excellent compatibility with Word, Excel, and PowerPoint files.

1. Download the Installer: Visit the official WPS Office website and download the macOS version.
2. Install WPS Office: Open the downloaded file and drag the WPS Office icon to your Applications folder.
3. Open Your Files Seamlessly: Launch WPS Office and directly open your existing Microsoft Office documents without losing any formatting.

Optimized for macOS with low CPU and memory consumption for a lag-free experience.Fully compatible with Microsoft Office file formats (.docx, .xlsx, .pptx).All-in-one interface lets you manage documents, spreadsheets, and presentations in a single tabbed window.Free to download and use with a familiar, easy-to-learn user interface.

microsoft office alternative - wps office

Frequently Asked Questions

Why does the spinning wait cursor keep appearing in Excel for Mac?

The spinning wait cursor (beachball) usually appears when Excel lacks sufficient memory (RAM) or CPU processing power to complete an action, or when it is waiting for a background process, such as auto-saving to the cloud, to finish.

Will reinstalling Microsoft Office fix the lag on my Mac?

Reinstalling can help if the lag is caused by corrupted application files or outdated components. However, it will not solve performance issues stemming from inadequate system resources, full hard drives, or conflicting background utilities.

Can incorrect default file apps cause Microsoft Word to open slowly?

Yes. If a file type is associated with a different program (like Apple Pages) but you try to force it open in Word, macOS may experience a slight delay resolving the software conflict and launching the correct application.

Office App Problems