Office for Mac Issues

Fix OneNote for Mac Crashing When Opening a Notebook

Maira Mehtab Sep 22, 2026 868 views

Question details

The user needs to stop OneNote from crashing continuously on Mac and restore access to missing notebook pages after moving a large subsection.

Product: Microsoft OneNote
Device & OS: macOS
Scenario: Attempting to launch the OneNote desktop application on a Mac after moving a subsection containing many pages to a new notebook.
Observed behavior: The application crashes immediately at startup with an EXC_BAD_INSTRUCTION error. Reinstalling the app does not help, and the moved pages display Content Not Yet Available on the web and iPad.

Before you start

Before attempting any fixes, immediately log into OneNote for the web to check the status of your notebooks and manually copy any accessible notes to prevent permanent data loss.

Solution 1Recommended

Verify Notebook Content via Microsoft Graph API and Web

Use the web version and administrative tools to determine if the notebook data is still intact on the server before clearing caches.

The startup crash on Mac is often triggered by the desktop client failing to process a corrupted or incomplete sync state (such as an improperly moved subsection). Fixing the sync state on the server end can often resolve the desktop crash.

Check web availability

Log in to OneNote for the web using your browser. Navigate to the newly moved subsection and check if the pages display the 'Content Not Yet Available' error.

Verify with other users

If this is a shared notebook, ask colleagues or other notebook users to verify if they can access the missing pages on their devices.

Query the OneNote API

Ask your Microsoft 365 Administrator to use Microsoft Graph Explorer and the OneNote API to query the specific notebook pages. This checks the backend server directly.

Clear browser data

If the API successfully returns HTML content, your data is safe but experiencing a display delay. Clear your browser cache and cookies, then try accessing the web version again later.

Preserve Data First: If the original notebook content remains accessible in its previous location, do not delete it. Wait until the newly moved pages fully sync and display correctly.

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Frequently Asked Questions

Why does OneNote for Mac show an EXC_BAD_INSTRUCTION error?

This error typically occurs due to application-level corruption or an unhandled exception in the app's code, often triggered by syncing conflicts, corrupted cache files, or notebook sections that the Mac client cannot process properly.

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

This message indicates that the notebook's contents haven't fully synced to the Microsoft servers from the original device where they were created or moved, or there is a server-side delay in processing the synced data.

How can I access my notes if the Mac desktop app keeps crashing?

You can temporarily access your notebooks by logging into OneNote for the web via your internet browser, or by using the OneNote application on another device like an iPad or Windows PC.

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