What's macOS minimum requirement? (macOS version and hardware)
On my macOS 10.12 Sierra the app doesn't start: on launch the OS asks for security confirmation, but then nothing happens and no error messages. Odd.
Maybe it has to do with the graphic card? (my Mac Mini 2014 has just an integrated Intel Iris Graphics).
(I downloaded the "STP Demo Director's Cut", but even the Original Demo did the same)