OneNote for Mac crashes on start

Anonymous
2014-07-02T02:40:09+00:00

<p>Today, when using OneNote for Mac my MacBook Pro crashed. After rebooting, it told me OneNote had caused the crash. Now, everytime I open OneNote, the app crashed immediately. I've tried re-installing through the App Store and removing caches but it keeps crashing on start.</p><p></p><p>What to do? Most important is there are a lot of unsynced changes I cannot afford to lose...</p>

Microsoft 365 and Office | OneNote | For home | Windows

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Anonymous
2014-08-07T01:02:07+00:00

I was able to fix the crash on startup by following these steps from another thread:

  • Delete this folder: ~/Library/Containers/com.microsoft.onenote.mac
  • Delete this folder: ~/Library/Group\ Containers/UBF8T346G9.Office
  • Open up “Keychain Access” app on your Mac, and search for “MicrosoftOffice”. If OneNote recognized that you signed in, you will have an entry with a long name. Delete it.
  • Restart your computer.
  • Try launching OneNote and signing in again.

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  1. Anonymous
    2017-06-13T13:26:47+00:00

    I followed these steps and after rebooting my Outlook database was corrupted.

    Luckily I hadn't emptied the trash and was able to restore the files, so I could get it working again.

    My fix for OneNote was to download it from the Mac App Store rather than use the Office 365 build.

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  2. Anonymous
    2017-10-30T00:00:00+00:00

    Amazing. Thank you. It worked.

    Even with my limited technological ability, I was able to follow your instructions easily.

    Thanks again.

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  3. Anonymous
    2017-11-19T00:47:05+00:00

    Searching for those files finds no files with those names.

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  4. Anonymous
    2017-12-06T15:54:04+00:00

    Scott Balun's solution worked for me, but BEWARE:

    It seems you do NOT need to delete the second folder (the "UBF..." one). If you do decide to delete it, make a backup copy of it first. Because I deleted it, and it erased all of my email accounts, and I would have had to go back and set up all six of them again. I also lost access to old work emails on a server that I don't have access to anymore. I've got them saved in a back up folder, but what a waste of time and pain in the next to manually go back and do all of that work. 

    Anyway, the "UBF..." was backed up before deleted, so I was able to past it back in, and voilà! All my accounts and emails are back.

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