Installing Linux Lite on VirtualBox Virtual Machine / MacOS ?

[Moltke]

From your previous reply, do you suggest that I try to run it from the host? How should I do this?

I wasn't suggesting just asking whether or not you tried running the "vbox extpack" and/or the guest additions from the host or the guest. In any case, the "vbox extpack" must be installed in the host and the guest additions, as its name implies, in the guest.

Also, while I was on the download page on Oracle's site I downloaded (in the Mac host) a package called “Oracle_VM_VirtualBox_Extension_Pack-4.3.40-110317a.vbox-extpack”. But I wouldn't quite know what to do with it either.

I haven't used a MAC in a while and as far I remember never used/installed vbox while at it, but in Linux and Windows, both the host, you double-click that file and VBox's main window will start, a dialog box pops up asking for a confirmation to install the extpack, click yes/ok and that should do it.

But yes, it's possible that 4.3.40 (the latest to run in Snow Leopard) is too old for Linux 20. In which case...

I'd rather wait for your replies before venturing on the VB forums. Some years ago both a family member and myself spent lots of time there trying to understand, among other things, how to run an older Mac OS in a VM on a newer Mac, using VB v.6. And got lost, and gave up.

Now, there's one thing I've discovered today, that may or may not be related: my machine has a 4 core processor, but if I try to tell Linux Lite to use more than one, it won't launch at all. The same is true of Lubuntu. While an XP VM that was installed a few months ago and runs without the slightest problem does so set to use all four processors.

You should at least ask whether or not it is possible to run/install Ubuntu 20.04 in that VBox version so you rule out the compability issue or to confirm that it doesnt, otherwise you might waste time and effort trying to make it work when it won't.