iMac OS Ventura 13.4.1 fails to prepare update to 13.5.1

Attempting to update from 13.4.1 to macOS Ventura 13.5.1.


Download is ok.

But the upgrade fails at "Preparing update" with no other error messages, just "Failed to prepare the software update. Please try again."

Tried updating with no peripherals connected, reset pram/nvram, and safe mode, allresulting in same error.


Any ideas folks?


Details:


Retina 5K, 27-inch, 2017

3.8 GHz Quad-Core Intel Core i5

Radeon Pro 580 8 GB

40 GB 2400 MHz DDR4


mac OS 13.4.1 (c) (22F770820d)

iMac 27″ 5K

Posted on Sep 4, 2023 11:10 AM

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iMac OS Ventura 13.4.1 fails to prepare update to 13.5.1

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