After nine years (2004-2012) of instructing the intellectual property issues of Windows eXtreme Programming, which was like having to dig one's way through the leaks in the underlying OSI model, migrating over to Mac OS X Mountain Lion in October 2012 came as a confirmation that there is light, at the end of the tunnel. To resume the instruction where the programmed obsolescence of the XP logic forced me to freeze it in November 2009, a conceptual pre-validation of the Mac OS X user experience was nonetheless unavoidable, considering that a well organized network is the aggregate result of what end-users configure at computer level!