Hi, my imac 17,1 won’t see the 005 catslina security update. It has 004 installed. I downloaded the package manually but it just hangs on the processing update screen for hours. Tried resetting pram. What else can I do to sort this?
About software update: have you tried with softwareupdate -l from Terminal? What does it return?
About updating: do you have enough space? You can try to start the installation from Terminal with