How to Fix OneDrive for Mac High CPU Usage After macOS Big Sur
Question details
Users need to resolve excessive CPU consumption and synchronization failures caused by OneDrive on Mac computers recently updated to macOS Big Sur.
- Product
- Microsoft OneDrive
- Device & OS
- macOS Big Sur
- Scenario
- Running OneDrive in the background to sync files after a major macOS system upgrade.
- Observed behavior
- OneDrive utilizes an excessive amount of system resources, causing the Mac's cooling fans to run constantly, and frequently fails to complete file synchronization.
Ensure your Mac has a stable internet connection and take a moment to copy any important, unsynced local files to an external drive to prevent data loss while troubleshooting.
Update to the Latest OneDrive Standalone Package
Installing the newest standalone version of OneDrive directly from Microsoft often resolves compatibility bugs introduced by macOS Big Sur.
Microsoft frequently releases standalone updates that bypass the Mac App Store to quickly patch performance issues like CPU drains and sync loops.
Visit the official Microsoft download page and download the latest standalone installer for OneDrive for Mac.
Run the downloaded package and follow the on-screen instructions to replace your current OneDrive installation.
Restart your Mac, launch OneDrive, and monitor your Activity Monitor to confirm if the CPU usage has returned to normal.
Disable Antivirus and Network Filtering Software
Third-party network filters and antivirus programs can block OneDrive's IMAP connections, causing the app to loop endlessly and consume high CPU.
Test OneDrive in macOS Safe Mode
Booting your Mac in Safe Mode helps determine if background startup applications are conflicting with OneDrive's operation.
Experience Lightweight Document Management with WPS Office for Mac
If Microsoft Office and OneDrive are draining your Mac's CPU and memory, consider switching to WPS Office. It provides an optimized, all-in-one workspace with highly efficient built-in cloud storage that keeps your Mac running smoothly.
- 1. Download the Mac Client: Visit the official WPS Office website and download the free, lightweight installation package designed specifically for macOS.
- 2. Install and Launch: Install the application, launch the unified workspace, and sign in to activate your free WPS Cloud storage.
- 3. Sync Without the CPU Drain: Save your documents directly to WPS Cloud, enjoying rapid synchronization that won't trigger your Mac's fans or monopolize system resources.
Frequently Asked Questions
Why does OneDrive use so much CPU on my Mac?
OneDrive may consume high CPU if it gets stuck in a sync loop due to network connectivity issues, interference from antivirus software, or when indexing a massive number of files after a major OS update like macOS Big Sur.
Is it better to use the Mac App Store version of OneDrive or the standalone package?
If you are experiencing performance bugs, the standalone package downloaded directly from Microsoft is often recommended. It frequently receives patches and bug fixes faster than the App Store version.
Will uninstalling and reinstalling OneDrive delete my files?
No. Uninstalling the OneDrive application simply removes the software. Your locally downloaded files remain safely in your OneDrive folder, and your cloud files remain secure on Microsoft's servers.
