Mail Crashing

My mail has developed a regular crash issue which I can't resolve.

I've done a Safe Boot (twice) and run the Disc Utility First Aid.

This is a from the Etrecheck report:

Diagnostics Information (past 7-30 days):

    2020-10-16 13:00:49 Mail.app - Crash (10 times)

        Executable: /Applications/Mail.app

        Details: 

            *** Terminating app due to uncaught exception 'NSRangeException', reas

            on: '*** -[__NSArrayM objectAtIndexedSubscript:]: index 92233720368547

            75807 beyond bounds [0 .. 7]'

            terminating with uncaught exception of type NSException

            abort() called


And a screen shot of part of the report sent to Apple is attached.


All help very much welcomed.

iMac, macOS 10.13

Posted on Oct 16, 2020 05:20 AM

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Question marked as Top-ranking reply

Posted on Oct 16, 2020 09:07 AM

If still no good Disconnect from the Internet, then start Mail, look for the last rec'd eMail.


Does Mail crash if no internet?


Quit Mail & login to your WebMail in a Browser, if possible delete any later eMails there after the last rec'd one on the Mac.


If you have no POP accounts & they’re all IMAP accounts then in Mail’s Mailbox menu choose Rebuild.

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3 replies
Question marked as Top-ranking reply

Oct 16, 2020 09:07 AM in response to doverrog

If still no good Disconnect from the Internet, then start Mail, look for the last rec'd eMail.


Does Mail crash if no internet?


Quit Mail & login to your WebMail in a Browser, if possible delete any later eMails there after the last rec'd one on the Mac.


If you have no POP accounts & they’re all IMAP accounts then in Mail’s Mailbox menu choose Rebuild.

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Mail Crashing

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