The client side magic on Linux is VHCI so I wonder if that’s portable to Mac. I don’t know how they implemented the beta of the Windows client but that might also be something to look at if more is done in user-land.
While not a Mac solution, there is a $40 x86 SBC called Atomic Pi which comes with Ubuntu 18.04 on flash and I have run Lightburn on that. Sorry but I too can’t find a viable opensource software-only solution for the Mac.
And Ray is right, I’ve seen way too many burned up machines and too many, I just went in for a moment to ________.