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Catalina 10.15.5 update error (-42023)

I am trying to update my Mac Air to the latest Catalina 10.15.5 version. Once I click 'update' it appears to go through the update process for about a minute before it then brings me back to the regular computer log-in page. I enter my password and log in and then an error message saying "An unknown error occurred (-42023)." This keeps happening and the computer won't update. Please help!!

Posted on Jun 13, 2020 5:39 PM

Best reply

kaz-k

Level 8

49,446 points

Posted on Jun 13, 2020 6:36 PM

Hi,

Try to download Catalina 10.15.5 updater from following site and install it which could be update your MacBook Air.

https://support.apple.com/kb/DL2039?viewlocale=en_US&locale=en_US

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Catalina 10.15.5 update error (-42023)

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