thats a silly thing to say. BSD licensed Unix already exists. if they wanted to build a proprietary OS on top of it (as Apple did) they would have. the fact that they already decided not to is the entire point here. Google chose GPL Licensed Linux over BSD Licensed Unix. From a technical perspective there's not a whole lot of difference. The license is the more important difference and we already know which they chose.
Apple didn’t build a proprietary OS on top of BSD licensed UNIX. They used the core of NEXTSTEP, which in turn used parts of several different BSD distros (though not its kernel or driver system).
