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Mac Mail stuck moving messages

Getting this problem consistently. Mail spends hours stuck in "moving messages". Goes in and out of Not Responding in Activity Monitor. Memory burgeons to 1.4GB - then when things free-up the memory collapses back to about 400MB. Lot of Disk Activity in Activity Monitor. Mail and / or mds_stores reading continuously , GB of data - looks like indexing activity (?). Then finally - things free up - for no apparent rhyme or reason and various message streams start flowing.......... Until the next time.... Getting to be unuseable.

MacBook Pro 15″, macOS 10.13

Posted on May 20, 2021 4:55 AM

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Posted on May 20, 2021 10:15 AM

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.


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

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May 20, 2021 10:15 AM in response to Robin Curtis

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.


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

Mac Mail stuck moving messages

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