David J. Parker: “My fellow Visio MVP, John Marshall (see https://johnvisiomvp.wordpress.com), pointed out recently that Lucid Software claim to have a Visio for Mac application that offers import and export of real Visio files.”
This comes up every now and again. I have wanted Visio on the Mac for a very long time, but we already have it. The fine folks at The Omni Group created OmniGraffle so the Visio team wouldn’t have to port to the Mac.
There was, of course, a port of Visio to the Mac Classic at one time. It never saw the light of day.