Have been using this tool for quite some time now. It always has worked reliably and allowed me to quickly view the Visio® diagrams my colleagues are producing.
Most Visio® viewers and diagramming apps on Mac are complete junk, but this one is a winner. Correctly renders even the most complex Visio® documents and export to PDF.
I have this app on all of my Apple devices. Can’t live without it. I also have received great support when a diagram fails to display.