If Not "my Operating System" Change Css - Jquery

I'm trying to make a 'css hack' that will allow me to change css depending on a user's OS. For Mac and iOS I want one style, for everything else (Windows, Linux, Android, etc...) I

Solution 1:

Saw something here:How to detect mobile browser using jQuery or in some other SIMPLE way..?

var android = (navigator.platform.indexOf("android")>=0); //true if android