Apple mail keeps crashing sierra

Frustrating! Apple Mail crashing on macOS Sierra can be caused by various reasons. Let's troubleshoot together to resolve the issue. Here are some steps to help you fix Apple Mail crashing on Sierra:

  1. Restart Apple Mail:
    • Quit Apple Mail by going to Apple Menu > Force Quit > Apple Mail.
    • Wait for a few seconds and then relaunch Apple Mail.
  2. Check for updates:
    • Make sure your macOS Sierra is up to date by going to System Preferences > Software Update.
    • If an update is available, install it and restart your Mac.
  3. Reset Apple Mail:
    • Go to System Preferences > Mail, Contacts, Calendars.
    • Click on Accounts and select the account that's causing the issue.
    • Click on Edit and then Advanced.
    • Click on Reset and then OK.
  4. Disable plugins:
    • Go to System Preferences > Mail, Contacts, Calendars.
    • Click on Accounts and select the account that's causing the issue.
    • Click on Edit and then Advanced.
    • Click on Plugins and disable any plugins that might be causing the issue.
  5. Clear Apple Mail cache:
    • Go to ~/Library/Mail/V2/MailData (or ~/Library/Mail/V3/MailData if you're using macOS High Sierra or later).
    • Delete the Envelope Index and Message Store files.
    • Restart Apple Mail.
  6. Check for conflicts with other apps:
    • Try closing other resource-intensive apps to see if Apple Mail crashes less frequently.
    • If you're using a third-party app that integrates with Apple Mail, try disabling it or uninstalling it.
  7. Reinstall Apple Mail:
    • Go to System Preferences > Mail, Contacts, Calendars.
    • Click on Accounts and select the account that's causing the issue.
    • Click on Edit and then Advanced.
    • Click on Reset and then OK.
    • Restart your Mac and try launching Apple Mail again.
  8. Reinstall macOS Sierra:
    • If none of the above steps work, you may need to reinstall macOS Sierra. This will erase all data on your Mac, so make sure to back up your files before doing so.

If none of these steps resolve the issue, you may want to consider seeking assistance from Apple Support or a professional Mac technician.