Office Performance Issues

How to Fix OneDrive for Mac High CPU Usage and Battery Drain

Nimra Malik Oct 9, 2026 869 views

Question details

Users need a solution to stop the OneDrive application from consuming abnormal amounts of system resources and battery on macOS.

How to Fix OneDrive for Mac High CPU Usage and Battery Drain

Product: Microsoft OneDrive
Device & OS: Mac (Apple Silicon / M1)
Scenario: Running the OneDrive client in the background to sync files on a Mac computer.
Observed behavior: OneDrive uses excessive CPU resources and causes rapid battery drain. The issue persists even after uninstalling and reinstalling the application.

Before you start

Verify that your macOS is fully updated to the latest version and temporarily pause OneDrive syncing to confirm it is the direct source of the battery drain.

Solution 1Recommended

Escalate to Microsoft Support for Backend Investigation

Since standard troubleshooting like reinstalling does not fix this specific Apple Silicon bug, escalating the issue to Microsoft Support for backend log analysis is the official recommended path.

Community moderators and standard user accounts do not have access to the backend logs required to diagnose memory leaks and high CPU utilization in the OneDrive client. Only the Microsoft development team can investigate the background conditions causing this.

You will need a user with Microsoft 365 Administrator privileges to open this specialized support ticket.

Access the Admin Center

Navigate to the Microsoft 365 admin center in your web browser and log in with your administrator credentials.

Create a New Support Request

Click on 'Support' in the left navigation menu, then select 'New service request'. Provide a detailed description of the OneDrive high CPU issue on Apple Silicon Macs.

Provide Application Logs

Work with the assigned support engineer to collect and submit the relevant background information and application logs from your Mac for the development team to analyze.

Escalate to Microsoft Support for Backend Investigation

Administrator Privileges Required: If you are using a personal account or do not have admin rights, you may need to reach out to your organization's IT department to submit this ticket on your behalf.

Solution 2

Reset the OneDrive for Mac Application

Resetting the OneDrive app clears its configuration cache, which can sometimes resolve unexpected high resource usage before you resort to contacting support.

Free Microsoft Office alternative

Switch to WPS Office for a Lightweight Mac Experience

If background services like OneDrive are causing performance bottlenecks and draining your Mac's battery, consider switching to WPS Office. It provides a highly optimized, battery-friendly workspace for document editing without forcing heavy background synchronization processes.

1. Download and Install: Visit the official WPS Office website to download the Mac version and drag the application to your Applications folder.
2. Open Your Documents: Launch WPS Office and open your existing Word, Excel, or PowerPoint files directly. No complex conversion is required.
3. Save Locally or to Cloud: Edit your documents smoothly and choose to save them locally on your Mac's drive to completely avoid background cloud syncing issues.

Highly optimized for macOS, natively supporting Apple Silicon (M1/M2/M3) processors for low CPU usage.Fully compatible with Microsoft Office formats, including .docx, .xlsx, and .pptx.Lightweight application footprint that preserves your Mac's battery life during heavy document editing.Flexible cloud storage integration, allowing you to save locally or sync manually without forced background drain.

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Frequently Asked Questions

Why is OneDrive suddenly using so much CPU on my Mac?

High CPU usage typically happens when the OneDrive client gets stuck in a continuous syncing loop, struggles to index large batches of files, or encounters a compatibility bug with macOS or Apple Silicon processors.

Will resetting or reinstalling OneDrive delete my locally saved files?

No. Resetting or uninstalling the OneDrive application only removes the application files and configuration settings. Your actual documents and files stored locally in the OneDrive folder or in the cloud will remain completely intact.

How can I temporarily stop the battery drain while I am working?

You can temporarily pause syncing to stop background activity. Click the OneDrive icon in the top menu bar, go to 'Help & Settings', select 'Pause syncing', and choose a duration (such as 2 hours or 8 hours) while you finish your work.