4.13.2 won't launch

When I click on the 4.13.2 launch button on my Mac, the Epic Games screen disappears and noting else pops up.
(for a brief moment, the Launch button reads “Busy,” before the window disappears)

Version 4.12.5 and 4.11.2 are listed in the Engine Versions menu, but I have not downloaded as I assumed I have all i need with the latest version installed.

Please help

do you have visual studio installed? I had to download nvs2015 community to get it to work.

Sorry that was VS2015 community