macOS Big Sur 14.3 Failed to update for iMac

Hi Everyone,


My update gets almost to the end of the download and says error failed to update , test your internet connection , my internet is fine.


Usually gets to about 4.5gb of the 5gb install before failing.


iMac , late 2015 , 5k Retina, 27inch display

iMac 27″, macOS 10.15

Posted on May 1, 2021 10:05 PM

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Posted on May 1, 2021 10:38 PM

Big Sur is Version 11, I think you are referring to 11.3 is the version you are having difficulty with. Please do the following:


3 replies
Question marked as Top-ranking reply

May 1, 2021 10:38 PM in response to Krupp42

Big Sur is Version 11, I think you are referring to 11.3 is the version you are having difficulty with. Please do the following:


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macOS Big Sur 14.3 Failed to update for iMac

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