MacOS 10.12.6 - Couldn't play because the game kept freezing as soon as I started, had to force quit every time.
I had success on 10.14.6 by installing the current Java JDK
Then I ran the jar directly (right click the Application "show package contents" >Contents>Java>libloader.jar)
I also had to edit contents> launch-config.json so the option for openGL was set to false.
Then aside from a slower (but still plays great) framerate the game played fine.