if (navigator.appVersion.indexOf("Mac")!=-1){
  function setCSS(css) {
   try {
    // append stylesheet to alter
    document.getElementsByTagName("head")[0].appendChild(css);
   } catch (e) {
    setTimeout(function(){setCSS(css)}, 100);
   }
  }
  
  // create CSS element to set up the page
  var css = document.createElement("link");
  css.setAttribute("href", "./css/mac.css");
  css.setAttribute("rel","stylesheet");
  css.setAttribute("type","text/css");

  // attempt to add the css and then keep trying till we do
  setCSS(css);
  css = null;
 
}else{
	 css = null;
}