On a Mac: I was notified of SKYPE update availability and so attempted to update but encountered a snafu and error message window indicating that "Please ensure you’re authorized to perform software updates on this Mac.". In most software, if one needs authorization, a special window comes up to request it. Does SKYPE not know how to implemement this solution? (Seems impossible to me.) Anyway, I aslo logged in as the Administrator for the computer and attempted to update that way, but encountered the same problem.