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Can't upgrade to 10.15.6 Supplemental Update: ERROR_D30C1E7565

When I try to install the macOS Catalina 10.15.6 Supplemental Update, I get an error.

ErrorDomain=PKDistributionError

Code=108 "ERROR_D30C1E7565"

I have to reboot and then the upgrade fails again each time (infinite loop).

I tried resetting the NVRAM and the SMC, but that didn't make any difference.

This is on an iMac (27-inch, Late 2013).

iMac 27″, macOS 10.15

Posted on Sep 20, 2020 9:51 AM

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