Who’d have thought that upgrading an unsupported Mac from High Sierra to something more modern would be so difficult, starting yesterday, just after finishing the cutting out for the light case, I decided, STUPIDLY, to upgrade my MacPro.
Anyway long story short, with some (actually quite a lot) help from MacFinder (who supplied said MacPro some 3 plus years ago) I am now as up to date as the machine is likely to get, so MacFinder will have a another chunk of change from me in a year or so for a replacement.
AS it goes there are not too many issues with running Catalina on an old 5.1 MacPro, the only issue that I can report is that it doesn’t support the older WiFi standard, but I can live with running internet via Ethernet, and the other functions that WiFi bought with it like Airdrop I have never had before, so no probs. I can’t upgrade further to BigSur as also bluetooth & other things stop working, so at least I have another 20 months or so before beating up the piggy bank.
I have subsequently been informed that I could have gone to Mojave with slightly less effort, but as I have always/sometimes/occasionally/never said, if you are going to go for it, go big or go home.