Yes, I have the last version of NX installed on both the Ubuntu box and my Mac.
There’s no desktop environment installed on the Ubuntu box. Just xvfb.
Is a desktop environment needed?
I don’t want to use a desktop environment on the Ubuntu box. I want to use it rootless, which is how I’ve used NX in the past, from a Windows computer at home to a Red Hat computer at work.
When I used NX rootless in the past, I never saw a remote desktop environment on my Windows computer. Just remote applications, running in their own windows on my home computer.
Though in that case, it was my desktop Linux computer at work, so it did have a real X server installed and it did have Gnome installed, even though I never saw Gnome when I was using the remote Linux computer from home via NX rootless.