What's crashing is just the fancy install selection screen, not the ArchiCAD installer itself. To run that, scroll down that finder window in your first screenshot, and double-click on the 'ArchiCAD 12' folder:
Then, double-click on 'ArchiCAD installer Launcher' from within that folder, and the ArchiCAD 12 install will begin.
Josh Osborne - Central Innovation
HP Zbook Studio G4 - Windows 10 Pro, Intel i7 7820HQ, 32Gb RAM, Quadro M1200