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How to Recover a Local or Offline OneNote Notebook on Mac
Question details
The user needs to recover offline OneNote pages or notebooks on a Mac after losing access to their Microsoft 365 account or experiencing a OneDrive synchronization failure.
- Product
- Microsoft OneNote
- Device & OS
- Mac
- Scenario
- Attempting to locate and restore offline OneNote notebooks using local Mac directories or Time Machine backups when cloud services are disconnected.
- Observed behavior
- The user cannot access cloud notebooks and needs to find local backup files (.one) or cache files on their Mac to restore the lost notes.
Ensure you have your Time Machine backup drive connected to your Mac if you plan to restore historical files, and note that you will need to unhide the Mac Library folder to access OneNote's backend application files.
Locate and Restore Local OneNote Backups on Mac
Access the hidden Application Support folder on your Mac to find local OneNote backup files and open them directly within the OneNote application.
Microsoft OneNote for Mac automatically saves local backup copies of your notebooks in a hidden directory. If you lose access to your Microsoft 365 account, you can manually navigate to this directory, extract the `.one` backup files, and open them.
Open Finder. In the top menu bar, click on 'Go', then press and hold the 'Option' key on your keyboard. The 'Library' option will appear in the dropdown. Click it to open your hidden Library folder.
Go to the following path: `~/Library/Containers/com.microsoft.onenote.mac/Data/Library/Application Support/Microsoft User Data/OneNote/` and look for a folder named with a version number (like 15.0 or xx.0). Inside, open the 'backup' folder.
Launch OneNote for Mac. From the top menu, select 'File' > 'Open Backups'. Browse to the backup folder you just located and select the `.one` file (e.g., 'Quick Notes.one') to open and recover your data.
If the file fails to open from its current location, drag the `.one` file to a more accessible location like your Desktop or a current Backup folder, and try opening it again via 'File' > 'Open Backups'.
Transfer and Open the Backup File on a Windows PC
If OneNote for Mac cannot open the recovered offline `.one` file, transfer the file to a Windows computer which has more robust local notebook support.
Looking for a Reliable Alternative to Microsoft 365? Try WPS Office
If you are tired of losing access to your documents due to cloud synchronization issues or account lockouts, WPS Office offers a lightweight, high-performance alternative. It allows you to manage and edit your files locally without forced cloud dependencies, while maintaining excellent compatibility with standard Office formats.
- 1. Download the installer: Visit the official WPS Office website and download the free installer tailored for macOS.
- 2. Install the application: Open the downloaded setup file and follow the standard on-screen instructions to install WPS Office on your Mac.
- 3. Open your files locally: Launch WPS Office and easily browse your local storage to open any existing Office documents without requiring a cloud login.
Frequently Asked Questions
Can I recover my OneNote data from Mac cache files?
No. Cache files found under `Library > Caches > Microsoft` are temporary data fragments used by the system for performance. They are not formatted as notebook backups and cannot be opened by OneNote.
How do I recover my OneNote files using Time Machine?
Connect your Time Machine drive, open Finder, and use the 'Go' menu (holding Option) to access your Library. Navigate to `Containers/com.microsoft.onenote.mac/Data/Library/Application Support/Microsoft User Data/OneNote/`. Once there, launch Time Machine from your menu bar, go back to a date before the synchronization failed, and restore the `.one` files to your Desktop.
Why can't I find the Library folder on my Mac?
By default, macOS hides the user Library folder to prevent accidental modification of system files. To reveal it, open Finder, click 'Go' in the top menu bar, press and hold the 'Option' key, and the 'Library' folder will appear in the list for you to click.
