It took a while but I took the plunge and have a 2017 MacBook Air (before the USB ports disappeared).
I downloaded Ed Mendelsohn's VdosPlus from his Nov. 11 2018 post here, but his usual detailed directions failed me. After installing it, on first run I got a screen with a very long/convoluted/confused path I was supposed to edit or accept. So I don't know where to put my XY directory and/or editor.exe or ed.bat.
I got XY up and running with Boxer but I don't love the way the font looks, or how to change it. And it seems there's no way to stop the Mac cursor from blinking.
Haven't tried another suggestion from the list, Crossover. But I had VdosPlusXy running flawlessly on Windows 7 and would be thrilled to have XY4 work like that on this Mac. Ed, or another Vdos user...are you there?
JP