I am waiting for the retina pro to become available in the high street at the moment. In the mean time I was wondering what the essential apps are. This will be my first apple product other then my phone. For one thing, I have seen people mention a lot about laptop temperature. Is this a built in feature or an app? If so what are the better ones? Also ones that monitor usage of ram and resources would be good, and any other apps you could not live without, I am after productivity ones rather then games etc though.