I have downloaded Xojo version 2017 v2r1 and xCode 8 on a MacBook. When opening a new ios project. the run and build button are disabled. When running xCode for the first time, i did accept the license agreement. So, why dont the button work? It is not the baught version, so i dont expect build to work, but i need to know what is going on as far as run is conserned.