
Good morning,
Welcome to Microsoft Community
Thank you for bringing this to our attention, I understand that you need assistance with OneNote sign in. If OneNote on your Mac is stuck in a sign-in loop, try these steps:
Basic Fixes
- Restart your Mac and try signing in again.
- Make sure your internet connection is stable.
Check App and System Updates
- Ensure OneNote is updated to the latest version in the Mac App Store.
- Check for macOS updates (System Settings > General > Software Update).
Sign Out and Reset Credentials
- Open OneNote and sign out (File > Sign Out).
- Close OneNote, then go to System Settings > Internet Accounts and remove the Microsoft account.
- Restart your Mac and sign back into OneNote.
Clear Cached Login Data
- Quit OneNote.
- Open Finder and go to: ~/Library/Containers/com.microsoft.onenote.mac/Data/Library/Application Support/Microsoft/
- Delete the OfficeAccount folder.
- Restart OneNote and try signing in again.
I hope this helps,
Best regards
JK
Microsoft Community
Moderator