I thought that the office suite for OS X was called "NeoOffice" and was essentially LibreOffice before LibreOffice was (in the sense of being a fork created to deal with Sun's disinterest in making a major important change; in this case, acting like a native program on OS X). I'd think that, if the LibreOffice community can convince the NeoOffice developers to collaborate, LibreOffice code could easily run the popular alternative suite on OS X, even if it is branded to refer to an intermediary. (And it probably actually would be worthwhile to have an intermediary who represents the needs of users of that platform.)