The application Microsoft Word quit unexpectedly.In addition to this situation, most users are also faced with these errors: How to fix it if Microsoft Word won't open at all?' It flashes immediately by double-clicking and then closes unexpectedly. Run EaseUS Mac file recovery software > Scan mac drive > Restore lost Mac word file. Start Word > Click 'Open' on the File menu > Click 'Repair' on the Open button. Open 'Library' > Open 'Preferences' > Copy file to desktop. Open Disk Utility > Select the primary hard disk on Mac and select 'First Aid' > Click 'Run'.