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(+1)

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.

"useOpenGL": false

Then aside from a slower (but still plays great) framerate the game played fine.