Is nDisplay supposed to work on Mac?

I’m trying to follow the documentation on nDisplay. I have 4.22 Studio on a Mac. But there’s no nDisplay template in my install, for one.
Then, even if I switch the plugin on, there’s no setting for it in the Project Settings, so I can’t enable it.
I know it is beta, but nowhere is it specified that it’s Windows only.
Am I missing something?