Well, that's most unhappy. I figured I'd spend part of Friday night updating the Family MacMini to Mojave and whoops! It's a mid-2011 MacMini 5,2 which is one year too old to take the 10.14.x update. I suppose as long as Apple keeps releasing Security Updates for High Sierra I won't have an issue, but my wife likes the Mini and I'd probably jest get a newer version. Oh, but wait, Apple hasn't had a new MacMini since 2014! Technically, that would buy us only a year (assuming Apple keeps with the 5-year planned support of their Macs) so a shiny new Late-2018 MacMini is the only real choice.