In SAM 2014.11.24, the non-U.S. weather files come from the sources listed in the Help topic for the Location and Resource page (SWERA, IWEC, CWEC -- see Help for descriptions). None of those data sources include files for South Africa, so none are included in SAM's solar resource library.
I downloaded SAM to my Mac applications folder, then clicked the Icon and --- nothing happened! I also tried opening it through the menu and again --- nothing happened. Anyone have a clue what is wrong?