Fix OneDrive Files Corrupted After Upload on MacBook Air M1
Question details
Users are experiencing file corruption issues where documents cannot be opened after syncing them to the cloud.
- Product
- Microsoft OneDrive
- Device & OS
- macOS (Apple M1 Processor)
- Scenario
- Uploading Excel workbooks, PDFs, and Word documents to OneDrive.
- Observed behavior
- Files appear corrupted and unreadable immediately after being uploaded to OneDrive from the MacBook Air.
Ensure you have local, uncorrupted backups of your important Excel, Word, and PDF files before attempting to re-sync or modify your OneDrive folder.
Isolate the Upload Method and Test File Integrity
Determine whether the corruption is caused by the macOS Finder integration or the OneDrive web interface by testing small files.
Sync issues on M1 Macs can sometimes be isolated to the desktop client. By testing different upload methods, you can identify the root cause of the file corruption.
Create a brand new, simple text or Word document on your Mac. Do not include any images or complex formatting.
Drag and drop this new test file into your local OneDrive sync folder in Finder and wait for the sync status to show a green checkmark.
Open Safari or Chrome, log into the OneDrive website, and manually upload a copy of the same test file using the 'Upload' button.
Download both uploaded files from the OneDrive web interface to your Mac and attempt to open them to see which upload method caused the corruption.
Update macOS and the OneDrive Sync Client
Outdated software running on Apple Silicon (M1) can cause architecture translation glitches resulting in data corruption.
Check OneDrive Storage Limits and Sync Errors
Exceeding storage capacity or hitting file limitations can abruptly interrupt the upload process, leaving files partially written and corrupted.
Use WPS Office to Prevent Formatting and Save Errors
If OneDrive sync issues continue to corrupt your Microsoft Office documents on your M1 Mac, consider switching to WPS Office. It provides a native macOS experience, seamless document handling, and reliable built-in cloud storage to keep your files safe.
- 1. Download for Mac: Get the native macOS version of WPS Office directly from the official website and install it on your MacBook Air.
- 2. Open Your Files: Open your local Excel, PDF, and Word documents in WPS Office without worrying about external sync corruption.
- 3. Save Safely: Save your progress locally or securely sync your documents using WPS Cloud, which is optimized for cross-platform stability.
Frequently Asked Questions
Why do my files get corrupted specifically on an M1 MacBook Air?
Corruption on Apple Silicon (M1) Macs can occur if you are using an older, non-native version of the OneDrive sync client. The translation process via Rosetta 2 combined with background syncing can occasionally cause data writing errors. Upgrading to the native M1 OneDrive client usually resolves this.
Can I recover a corrupted Excel or Word file from OneDrive?
Yes, you can often recover an uncorrupted version using OneDrive's Version History. Log into the OneDrive web interface, locate the corrupted file, right-click it, and select 'Version history'. From there, you can restore a previous version saved before the corruption occurred.
Do file restrictions in OneDrive for Business cause file corruption?
They can cause files to appear corrupted or unopenable. OneDrive for Business may have organizational policies that block certain file types, enforce encryption, or restrict long file paths. If a sync is forcibly stopped by these rules mid-upload, the resulting file on the cloud may be unreadable.
