I just bought a new Mac mini, and have attached to it a Logitech keyboard that was (a) designed for Macs, and (b) worked just fine with my old G4s. It has an "Alt" key (with Mac's "squiggly square" symbol on it) and an "Option" key (with the "Windows" icon on it). Previously, my cut-and-past function (for example) used the "Alt" key (e.g., Alt + C for copying; Alt + V for pasting). Now, with my new mini, the functions of these keys seems to be exactly reversed. Same with the "Select All" routine: Used to be Alt + A, but now it's Opt. +A. I supposed I could relearn the functions; but I'm wondering if there's any way that I could switch the functions of these two keys and restore my keyboard's operation as it was with my G4s?