There is a not so recent arti­cle that does a great job of explain­ing why OS X is more secure than Win­dows.  It uses the clas­sic “bro­ken win­dows” the­ory of urban decay, applied to the com­puter realm.  The extreme secu­rity of the Mac has very lit­tle to do with mar­ket share.  “Win­dows has more viruses […]