I'm running a MacBook Pro 13in 2017, Mojave v10.14.6. I'm using latest Pycharm and installed PyGame (v1.9.6) through it.
When I run a simple Pygame script through pycharm a pygame window appears, but with nothing displayed. However, when I run the same scrip through the terminal the shape appears correctly. I've attached a photo of what I'm describing.
Let me know if I can provide more details.