So, this may seem like a minor thing but perhaps it would be an easy fix.
It took me a while to figure out how to find the export to HTML settings.
I don’t think it’s great to have this tucked into a context menu – but, aside from whether or not it’s there – on a Mac, the standard way to open a context menu (i.e. “right-click”) is to hold down control and click (Right-click on Mac - Apple Support).
So I was clicking everywhere in the tree on the side, to no avail. The documentation says to right click. I eventually went into my OS settings and changed my trackpad to have two fingers trigger a context menu – and this worked. But still, control clicking does not work.
Anyhow, I know how it works now, but I thought you might want the feedback for future MacOS users.