I know this is going OT for this thread, but people really need to come forward by about a decade. Windows is no longer the security swiss cheese that it used to be. The old claims that Mac OS X is invulnerable are also no longer true
http://blogs.computerworld.com/malwa...ecure-mac-os-x
http://www.extremetech.com/computing...-and-mobile-os
http://www.itproportal.com/2012/07/3...re-os-in-town/
And separately, KVS is a Windows program, plain and simple. There are plenty of applications that are not available for every platform. Do you hear people complaining because iMovie isn't available on Windows? How about the Halo franchise not being on PS3/PS4? Nope. (ok, people may complain, but they coming out and demanding that something be done about it?)
To put it bluntly, KVS is a relatively small operation (my personal guess is a single owner/coder/support rep...i.e. one guy/gal doing everything). They see no reason to provide a native Mac version and that is their right as a business. If they saw a legitimate business case for it that would entail a higher profit margin, I would be they would jump at it. I find it quite customer friendly that KVS even offers a modicum of support to those running in a non-fully native Windows environment (i.e. outside of what KVS was originally coded for).