That is OSX.. lets see the 'activity monitor' and a double click on the "CPU usage"
Really?? The screenshot is of OSX, but he's blatantly using TeamViewer to remote into a Windows8 machine that's running 8 instances of CGMiner 3.1.1 to run 76 devices. And that Intel NUC is a 4"x4" little box with a dual-core 1.8GHz CPU. Not exactly beefy.