For running Unity games
Generally content developed with Unity can run pretty much everywhere. How well it runs is dependent on the complexity of your project. More detailed requirements:
•Desktop:
•OS: Windows XP SP2+, Mac OS X 10.8+, Ubuntu 12.04+, SteamOS+
•Graphics card: DX9 (shader model 2.0) capabilities; generally everything made since 2004 should work.
•CPU: SSE2 instruction set support.
•Web player supports IE, Chrome, Firefox, Safari and others.
•iOS: requires iOS 6.0 or later.
•Android: OS 2.3.1 or later; ARMv7 (Cortex) CPU or Atom CPU; OpenGL ES 2.0 or later.
•WebGL: Desktop version of Firefox, Chrome or Safari
•Windows Phone: 8.1 or later
•Windows Store Apps: 8.1 or later