Like I said, there are various statutes and judicial case law that permits a person who was already granted SOME rights by the exclusive right holder to do things the exclusive right holder doesn't want them to do. But there is nothing (other than fair use in some situations) that gives someone NOT granted ANY rights by the copyright holder ANY rights.
109(a) gives you rights, as do other sections, when you are sold a copy of a copyrighted work, on a particular media produced by the copyright holder. If OS X wasn't for sale, yes, no one would have any rights to it unless they got a contract license with Apple.