OneDrive File Issues

How to Recover Missing OneNote Notes and .onetmp Files on Mac

Muhammad Talha Sep 29, 2026 868 views

Question details

The user needs to recover missing OneNote sections and .onetmp files on a Mac, which often indicates a synchronization issue or complications from a recent OneDrive restore.

How to Recover Missing OneNote Notes and .onetmp Files on Mac

Product: Microsoft OneNote
Device & OS: Mac
Scenario: Attempting to locate and restore missing notes after a synchronization failure or a OneDrive account restore operation.
Observed behavior: OneNote sections are missing from the local application, and users are left with inaccessible .onetmp files instead of their synced notes.

Before you start

Do not uninstall or delete the OneNote application on your Mac before attempting recovery, as this could permanently erase locally cached unsynced data.

Solution 1Recommended

Check OneNote for the Web and Force Sync

Verify if your notes successfully synced to the cloud before they went missing, and force your Mac application to update.

Often, the local Mac application simply fails to download the latest sections. Checking the web version helps determine if the data still exists on Microsoft's servers.

Access OneNote Online

Open your web browser, navigate to OneNote for the web, and sign in using the exact Microsoft account associated with your notebook.

Verify Notebook Sections

Open the affected notebook in the browser and look for the missing sections. If they are visible, your data is safe on the server.

Force Manual Sync on Mac

Open the OneNote app on your Mac, right-click the name of the problematic notebook in the sidebar, and select 'Sync This Notebook' from the context menu.

Check OneNote for the Web and Force Sync

Check Account Credentials: Ensure you are signed into the correct personal, work, or school account, as notebooks are tied strictly to specific Microsoft accounts.

Solution 2

Inspect the OneDrive Recycle Bin

Recover notes that may have been inadvertently deleted or moved during a recent OneDrive restore process.

Solution 3

Preserve .onetmp Files and Contact Support

Safeguard temporary cache files and provide them to Microsoft Support for advanced data recovery.

Free Microsoft Office alternative

Switch to WPS Office for Reliable Document Management

If complex sync issues and missing files are slowing down your workflow, consider switching to WPS Office. It provides a stable, free, and lightweight alternative to Microsoft Office, featuring built-in cloud backup and seamless format compatibility.

1. Download the Installer: Visit the official WPS website and download the Mac version of WPS Office.
2. Install WPS Office: Open the downloaded file and follow the straightforward on-screen instructions to install the suite.
3. Sign In for Cloud Features: Log in to claim your free WPS Cloud storage, ensuring your local documents are automatically backed up and synced without errors.

Completely free and highly lightweight software suitePerfect compatibility with Microsoft Word, Excel, and PowerPoint formatsBuilt-in WPS Cloud for stable, auto-saving document backup to prevent data lossFamiliar, intuitive user interface requires zero learning curve

microsoft office alternative - wps office

Frequently Asked Questions

What does the 'Content Not Yet Available' error mean in OneNote?

This error occurs when a OneNote notebook was opened from another device, but the content has not yet finished syncing to the cloud server. It typically resolves itself once the original device connects to the internet and completes the sync.

Can I open .onetmp files directly on my Mac to view my notes?

.onetmp files are raw temporary cache files created by OneNote during synchronization. They cannot be opened directly as standard readable documents. They must be preserved and handled by Microsoft Support for potential recovery.

Why did my OneNote files move to the OneDrive recycle bin?

If you perform a OneDrive account rollback or use the 'Restore your OneDrive' feature, any files that were created or modified after your selected restore date are automatically moved to the recycle bin to prevent version conflicts.

How do I prevent OneNote sync failures in the future?

To prevent data loss, always ensure the sync status icon shows a green checkmark before closing the app. Avoid using third-party cleaning tools that might delete OneNote's local cache, and regularly check OneNote for the web to confirm your notes are successfully backed up.

Document & File Issues