Unable to Install 10.15.4 Supplemental Update on Mac mini 2018 — Unable to Verify Update

[platyhsu]

I’m unable to install the 10.15.4 Supplemental Update on my Mac mini 2018. The download was successful, but when I click “Install” there will be an “Unable to Verify Update” error stopping me from updating.

I have tried rebooting, updating under the safe mode, and updating with the “combo update” package provided by Apple; none of them worked.

I also received the same update on my MacBook Pro 15" 2019 and experienced no problem updating.

Any suggestion? Thanks.

 

[bogdanw]

Have you tried the macOS Catalina 10.15.4 Supplemental Update DMG? https://support.apple.com/kb/DL2038

 

[platyhsu]

Have you tried the macOS Catalina 10.15.4 Supplemental Update DMG? https://support.apple.com/kb/DL2038

That was actually my first response — but no luck

 

[CoastalOR]

I’m unable to install the 10.15.4 Supplemental Update on my Mac mini 2018. The download was successful, but when I click “Install” there will be an “Unable to Verify Update” error stopping me from updating.

I have tried rebooting, updating under the safe mode, and updating with the “combo update” package provided by Apple; none of them worked.

I also received the same update on my MacBook Pro 15" 2019 and experienced no problem updating.

Any suggestion? Thanks.

Try downloading a new copy of the 10.15.4 Combo Update that includes the changes of the Supplemental update and running the Combo:

Download macOS Catalina 10.15.4 Combo Update - Apple Support

macOS Catalina 10.15.4 introduces iCloud Drive folder sharing, Screen Time communications limits, Apple Music time-synced lyrics view, and more. The update also improves the stability, reliability, and security of your Mac.

support.apple.com

EDIT: I would recommend having a fresh backup before applying any OS update.