I was under the impression that any generic windows USB keyboard would work with a mac but I just got a Logitech K120 USB wired keyboard and it's not working with my mac. It's a really vanilla keyboard with no extra keys. When I try and remap the control/option/command keys, it looks like the windows key and the Alt key are seen by the mac as the same thing so they can't be mapped properly. This seems wrong to me since when running windows they would have to send different signals for the two keys, right? I previously had another windows usb keyboard on this machine and it worked fine. Is it possible that this one model is somehow not mac compatible or could it just be a defective unit?