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Disappearing Mailboxes

All the mailboxes 'on my Mac' just disappeared. What happened?


iMac 21.5″, macOS 10.12

Posted on Dec 9, 2020 1:47 PM

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Question marked as Top-ranking reply

Posted on Dec 10, 2020 8:12 AM

Let us start with this...


Safe Boot, (holding Shift key down at startup), does the problem occur in Safe Mode? Could take 10 minutes.


Safe mode attempts to repair Disks & clears lots of caches & loads safe Drivers, & prevents loading of 3rd party extensions, so if Safe Mode works try again in regular boot.

1 reply
Question marked as Top-ranking reply

Dec 10, 2020 8:12 AM in response to della147

Let us start with this...


Safe Boot, (holding Shift key down at startup), does the problem occur in Safe Mode? Could take 10 minutes.


Safe mode attempts to repair Disks & clears lots of caches & loads safe Drivers, & prevents loading of 3rd party extensions, so if Safe Mode works try again in regular boot.

Disappearing Mailboxes

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