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andydckent

macrumors member
Original poster
Jun 2, 2009
59
4
Edinburgh, Scotland
Hi,

Each time I have updated Big Sur (11.2 to 11.3, 11.3 to 11.4 etc.) on my 2017 iMac 27 I've been left with a black screen with spinning cog in the middle. This screen remains when left overnight.

A shut down and reboot restarts the computer normally and although the first log in is slower than usual, the update is successfully completed and all is well.

Is anyone else having this issue? Does anyone know why this occurs and what i can do to fix it?

Thanks

Andy
 
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