Split from this thread.
I have the exact same issue and have followed your recommendation. I still have the problem even in safe mode. This started after the latest Microsoft Automatic Update which included OneNote.
1. What steps did you do before the crash occurred?
I got it down to 1) restart the computer, 2) open OneNote, 3) right click on a misspelled word, select one of the spellings offered and OneNote stops responding
2. Does the issue occur to all notebook or a specific note book?
Confirmed, all note books, and in Safe Mode as well
3. Share your OneNote version and OS version with us.
OS version: macOS High Sierra 10.13.2