The download page doesn't show anything particularly helpful if you're on an unsupported platform (eg Linux). From the source:

window.onload = function detectOS(){

   if (navigator.userAgent.indexOf("Mac")!=-1) window.location.replace("/download/mac");

   if (navigator.userAgent.indexOf("Win")!=-1) window.location.replace("/download/windows");

   if (screen.width <= 992) {window.location.replace("/download/other-device");};

   return undefined;
}