. . "Mac desktop and laptop computers have replaceable batteries and RAM, but frequently it takes a bit of effort, skill and confident cojones to replace the hard drive and other parts, it???s even worse for mobile iDevices where Apple???s unique (and quite tiny) ???pentalobular??? screws, which look like average Torx screws but aren???t, and glued on glass are indicative of Apple???s ???tamper resista" . .