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How to Fix OneDrive 404 Error and Office Apps Not Working on Mac
Question details
The user is experiencing a OneDrive 404 error that prevents Microsoft Word, Excel, and PowerPoint from functioning online on a Mac computer.
- Product
- Microsoft OneDrive and Office Online
- Device & OS
- macOS
- Scenario
- Attempting to access or sync OneDrive files and use Office web applications via a browser or desktop integration on a Mac.
- Observed behavior
- A 404 error is displayed, blocking access to OneDrive and causing Word, Excel, and PowerPoint online apps to fail.
Ensure your Mac is connected to a stable internet connection and that you know your current Microsoft 365 account credentials before modifying system settings.
Enable Local Network Permissions for Office Components
This is the most common fix for macOS users, especially after updating to macOS 15, as restricted local network access can trigger 404 connectivity errors.
Recent macOS security updates, particularly macOS 15, have introduced stricter controls over how applications interact with your local network. If Office components are blocked, they cannot communicate properly with Microsoft's servers, leading to a 404 error.
Click the Apple logo in the top-left corner of your Mac screen and select 'System Settings' from the drop-down menu.
Scroll down the left sidebar and click on 'Privacy & Security'.
In the Privacy & Security menu, locate and click on 'Local Network'.
Find any components related to Microsoft Office, OneDrive, or Microsoft 365 in the list. Toggle the switch next to each one to turn it on (blue), then restart your browser and Office apps to check if the issue is resolved.
Verify Your Microsoft 365 Subscription and Account
Use this solution to confirm that an expired subscription or incorrect account login is not causing the server to reject your access.
Contact Microsoft Support with the Correlation ID
If local network settings and account verification do not solve the 404 error, the issue may be on Microsoft's servers.
Use WPS Office as a Reliable Alternative for Mac
If Microsoft Office online apps continue to fail with 404 errors, try WPS Office. It provides a lightweight, fully compatible desktop experience for Mac users without relying on complex network permissions, ensuring your productivity is never interrupted.
- 1. Download for Mac: Visit the official WPS Office website and download the macOS installation package.
- 2. Install the Application: Open the downloaded file and drag the WPS Office icon into your Applications folder.
- 3. Open Your Files: Launch WPS Office and directly open your existing Microsoft Office files to continue working seamlessly.
Frequently Asked Questions
Why does updating to macOS 15 cause OneDrive 404 errors?
macOS 15 introduced tighter security and privacy controls, specifically regarding how apps access your local network. If OneDrive or Office apps are not explicitly granted permission in System Settings, they are blocked from communicating with servers, resulting in a 404 error.
What is a correlation ID in a Microsoft error message?
A correlation ID is a unique tracking code generated by Microsoft servers when an error occurs. It does not explain the error to you, but it allows Microsoft support engineers to look up the exact server logs related to your failed request to diagnose the issue.
Can I still edit my documents offline if Office Online shows a 404 error?
Yes, if you have the desktop versions of Word, Excel, and PowerPoint installed on your Mac and a valid offline license, you can continue to edit files saved locally. However, changes will not sync to OneDrive until the 404 connectivity issue is resolved.
