Deleted File Recovery

How to Restore a OneNote for Mac Notebook from Cache Folder

John WilsonJohn Wilson Oct 16, 2026 868 views

Question details

The user needs to recover a missing OneNote notebook on Mac and wants to restore it using the files located in the local cache folder.

How to Restore a OneNote for Mac Notebook Found in the Cache Folder
Product
Microsoft OneNote
Device & OS
macOS
Scenario
A notebook is missing from OneNote on Mac, and the user has found the local cache files, attempting to use them for restoration.
Observed behavior
The user has located local cache files but needs to know the correct procedure to restore the notebook without corrupting the data, as direct modification of cache files is unsupported.
Before you start

Do not attempt to move, copy, or rename the raw files inside the OneNote cache folder, as this can permanently corrupt your notebook data. Ensure you have your Microsoft account credentials ready before attempting a safe recovery.

Solution 1Recommended

Safely Open the Notebook via OneDrive

The most reliable way to restore your notebook is to bypass the local cache entirely and sync directly from OneDrive.

OneNote cache files are temporary working files, not supported backup archives. Copying or modifying them directly usually leads to data corruption.

Instead of tampering with the cache, you should force OneNote to re-sync the missing notebook from the cloud.

1
Close the Application

Quit OneNote completely on your Mac to ensure there are no active sync conflicts.

2
Sign In to Your Account

Reopen OneNote and verify that you are signed in with the exact Microsoft account associated with the missing notebook.

3
Open from OneDrive

Navigate to 'File' > 'Open' (or 'Open Notebook') within the OneNote application, browse your OneDrive folders, and select the missing notebook to restore it.

Safely Open the Notebook via OneDrive
Cache Files Warning: Never edit or replace OneNote cache files directly. Always make a copy of any potentially recoverable files outside the cache directory if you are unsure.
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Frequently Asked Questions

Can I manually copy OneNote cache files to another Mac to restore my notes?

No, Microsoft OneNote does not support the manual transferring of cache files between devices. Doing so typically results in corrupted notebooks that cannot be opened by the application.

Where is the OneNote cache folder located on a Mac?

The cache folder is generally located in your Mac's hidden user Library folder under Containers. However, it is strongly advised not to interact with these system files directly to prevent permanent data loss.

Why are my OneNote notebooks suddenly missing or not syncing?

Sync issues and missing notebooks can occur due to disconnected Microsoft accounts, full OneDrive storage limits, or network connectivity problems. Always ensure your account is properly signed in and re-sync via File > Open Notebook.