Royal Adelaide of course!
Just drove past there yesterday in fact. Not much of Mackenzie in this hole. Its not a trolley line but a passenger train line. There used to be a stop at the clubhouse, convenient for the toffs coming out from the city.
Mark
Royal courses with confirmed Mac involvement, although not all of these had necessarily their Royal patronage at the time:
Royal Melbourne, Royal Adelaide, Royal Sydney, Royal Queensland, Duff House Royal, Royal Troon (Portland), Royal County Down (Ladies Course), Royal Eastbourne, Royal St George's.