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How to Fix Microsoft 365 Web Apps Freezing on macOS Sonoma
Question details
Microsoft 365 web applications are freezing and triggering browser performance warnings across multiple browsers on macOS Sonoma.
- Product
- Microsoft 365 Web Apps
- Device & OS
- macOS Sonoma
- Scenario
- Opening and editing Word documents through the Microsoft 365 online platform using standard web browsers.
- Observed behavior
- The web page freezes and displays a browser warning stating that the page is slowing down the browser, making the document uneditable.
Before proceeding, ensure you have a stable internet connection and try to save any offline copies of your work, as network drops can sometimes cause heavy web applications to hang.
Optimize Browser Settings for Microsoft 365
Resolving browser-level conflicts like corrupted cache or problematic extensions is the most effective way to fix web application freezing.
Since this issue occurs across multiple browsers (Firefox, Chrome, Safari), it is often tied to how browsers cache heavy web app data or interact with privacy extensions.
Open an Incognito (Chrome), Private (Safari), or New Private Window (Firefox). Log into Microsoft 365 and open your document to see if it runs smoothly without active extensions.
Navigate to your browser's settings (e.g., Safari > Settings > Privacy > Manage Website Data) and clear your cached images, files, and cookies to remove corrupted temporary data.
Temporarily turn off all browser extensions, specifically ad-blockers, script blockers, or privacy shields, then reload the Microsoft 365 web page to identify the culprit.
Update System and Browser Environment
Outdated software or network instability on macOS Sonoma can lead to performance warnings when running complex web applications.
Use Desktop Applications and Submit Feedback
If the web application remains unstable, use desktop software as a temporary workaround and notify Microsoft's development team.
Experience Stable Offline Editing with WPS Office for Mac
Avoid browser freezes and slowdowns on macOS Sonoma. WPS Office is a lightweight, fully-featured desktop suite that provides a seamless alternative to Microsoft 365 web apps without relying on your browser's performance.
- 1. Download and Install: Get the free WPS Office for Mac installer from the official website and follow the straightforward setup process.
- 2. Open Your Documents Directly: Simply double-click your existing Microsoft Office files to open them securely in WPS Office.
- 3. Edit Without Limitations: Enjoy stable desktop editing free from browser constraints and save your work locally or to your preferred cloud storage.
Frequently Asked Questions
Why do Microsoft 365 web apps show a 'page is slowing down' warning on macOS Sonoma?
This warning typically appears when the web browser struggles to process the heavy scripts required by Microsoft 365 web apps. It can be caused by accumulated cache, conflicting browser extensions, or temporary compatibility bugs between the browser and macOS Sonoma.
Will clearing my browser cache delete my saved Word documents?
No, clearing your browser cache and cookies only removes temporary local files stored by the browser to load pages faster. Your Word documents are safely stored in your cloud-based OneDrive account and will not be affected.
Is there a way to edit my documents if the Microsoft 365 web app completely stops working?
Yes, you can use desktop applications as a workaround. If you do not have a paid Microsoft Office desktop subscription, you can download a free alternative like WPS Office to open, edit, and save your documents directly on your Mac without needing a browser.
