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Macbook Pro- iCcal events won't move or delete, reappear or move back

Frequently, but not at all times, when I change the day/time of an event, (recurring or one time), the event moves back to the original day/date/time. Drag/drop or open and edit both fail. Even deleting some events. They move or delete and then pop back up.


This is not new to this OS version.


MacBook Pro11,1


11.6.3 (20G415)

MacBook Pro 13″, macOS 11.6

Posted on Feb 14, 2022 2:10 PM

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Question marked as Top-ranking reply

Posted on Feb 14, 2022 3:31 PM

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.

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Question marked as Top-ranking reply

Feb 14, 2022 3:31 PM in response to rglater

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.

Macbook Pro- iCcal events won't move or delete, reappear or move back

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