Mac OSX is far superior in my opinion, as both a OS X and Windows user, I feel that Mac OS X is much easier to use and aesthetically more pleasing. Before people say about customisation... you really don't need to customise every single feature under the sun. Security over customisation. Sorry to burst your bubble but the only thing Mac OS has going for it is the optimisation for the hardware that Apple dictates. Mac OS is so far from a secure OS, I would even go as far as saying it is less secure than Windows. You want a secure OS you will either have to create your own or really up your game and use a Linux distro. Ite... From the past 3 years here are some statistics (This is from downloading a hell of a lot of torrents, zips and rars from untrustworthy sources and both professional and casual downloads). Windows Viruses = More than 5, 1 resulting in reinstallation. Mac OS X Viruses = Less than 2, 0 resulting in reinstallation. This is from using both in the same way, laptop for when I am not at home. I know Linux is the more secure OS however I would say Mac OS X is most practical for my area of desire. Not once have I contemplated getting rid of my iMac for a Windows Desktop - it runs exactly how I need it with minimal Viruses. Viruses = Malware, Trojans, Adware, etc. Acquiring malware is not a fault of the operating system but of the operator. 5 years of heavy torrenting on Windows and 0 (yes 0, believe it or no) infections. If you want to talk about security of an OS generally we should talk about flaws in the code and 0 day exploits and not purposely written code to exploit users stupidity.