Trouble downloading (and then installing) macOS Catalina from Mojave.
I've decided that BigSur OS is now out, it's time to upgrade to Catalina, but for some reason when I click on upgrade now, it downloads for a few seconds, claiming there's 6 minutes to go, and 562 MB has been downloaded, but then I get the error message "The network connection was lost." Even though the internet is working for everything else. No matter how many times I try I get this message. I'm on a 2012 Mac mini.
Mac mini, macOS 10.14