Thanks for the prompt Rod - downloading Catalina now and will follow with Big Sur once that is downloaded. You guys are brilliant! Come to Ireland and I will buy you a nice pint of Guinness.Thank you for your great reply. I’m sure I can speak for everybody here when I say it’s terrific to get positive feedback.
Just one last hint, as I think was mentioned, the macOS after Big Sur is soon to be released. When that happens Apple tends to remove the previous macOS from the App Store, albeit not permanently.
I would advise, if you have the storage space (about 15GB) to simply download the Big Sur installer. Quit it when it launches and leave it in your application folder till you're ready.