Share via

Outlook won't start after latest Mac Update

Wilco Wietsma 0 Reputation points
2026-06-06T15:29:20.8766667+00:00

Just installed the latest Mac Update and Outlook won't start up anymore:

EXC_BAD_INSTRUCTION
Crashed Module Name: HxCore

Anyone else with this problem and a fix?

Outlook | MacOS | New Outlook for Mac | For business
0 comments

1 answer

Sort by: Most helpful
Most helpful Newest Oldest
  1. Salamat Shah 420 Reputation points MVP
    2026-06-06T16:01:39.62+00:00

    Delete Outlook cache/profile → relaunch (rebuilds clean).

    • Reset Outlook cache
      • Quit Outlook
      • Go to: ~/Library/Group Containers/UBF8T346G9.Office/Outlook
      • Delete Outlook Profile / Data folders (or move to backup)
    • Clear identity (safe reset)
      • Open Keychain Access → delete Outlook / Office tokens
    • Update Office
      • Microsoft AutoUpdate → install latest build (important after macOS updates)
    • Try New Outlook toggle
      • Open Outlook → switch New Outlook ON/OFF
    • Reinstall clean (if still broken)
      • Uninstall Outlook → reboot → reinstall from official source

    Was this answer helpful?

    0 comments

Your answer

Answers can be marked as 'Accepted' by the question author and 'Recommended' by moderators, which helps users know the answer solved the author's problem.