For another project I just ordered the cheapest Mac mini
Not sure if it is powerful enough to play Willy -- didn't buy it for heavy work, more for researching things -- but I can probably at least test some things. I think you just proved what I suspect. The .vis file and all the .vs files are the same in Windows, Linux and Mac OS X. Which is logical, those three have the same interactions with programs. I'm curious how the Android version differs, but Nenad convinced me that there differences are likely.