High Sierra 10.13.6 would not install
As the title says, the latest update would not install on my 2017 highest-possible-end iMac. I recently had to do a Time Machine re-install of the whole thing (took over 40 hours); maybe this is somehow the reason?
It got caught in a loop where it'd try to update, tell me it couldn't, and if you just restarted it would try again. Quitting the installation program and choosing a start drive started the computer fine, but the update has obviously still not been applied.
iMac (Retina 5K, 27-inch, 2017), iOS 10.3.2