What program for repaint files on mac?

Hi
I finaly understand the advantage of a repaint file.
->Being able to change some colours and see the effect at once. Or to print a pattern in a different size for easier reading.

I usually use my mac laptop and have not yet found a program to use the xsd files.

Does anyone know of a good program maybe a free one?
Or even a paid one.

Im sure there are other mac users out there that like the xsd files.

I am thankful for all sugggestions!