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email crash, High Sierra, NSArrayM ObjectAtIndexed Subscript

I have already rebuilt my mailbox, deleted plists, and deleted envelope index files to no avail.


Crash happens at any time - when sending an email, when deleting emails, and today when just writing an email.


Any suggestions are appreciated. Thank you.

MacBook Pro 13", macOS 10.12

Posted on Apr 9, 2020 4:05 PM

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Question marked as Apple recommended

Safe Boot from the HD, (holding Shift key down at startup), does the problem occur in Safe Mode?


Safe mode attempts to repair Disks & clears lots of caches, so if Safe Mode works try again in regular boot.


What are the paths for Trash, Drafts, Sent, etc...

Posted on Apr 9, 2020 6:08 PM

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16 replies

May 11, 2020 11:53 PM in response to TonyCr46

Your 3rd party apps may be creating a hole in the mail system resulting in a crash. Security Update 2020-002 High Sierra was the update that was put out to address the issue with mail. It seems like one of those 3rd party apps (probably the spam one) is causing the crash because the send/receive process runs when you send a email or when you open the mail app. So, when you send an email the receive process runs and the spam filter sounds like it crashes. You may want to leave it uninstalled.

email crash, High Sierra, NSArrayM ObjectAtIndexed Subscript

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