Yeah -XstartOnFirstThread is required, MacOS doesn’t love OpenGL 😅
The Mac version was built on my crappy 2012 MacBook air, so my guess is this is a retina display issue?
Can you try:
java \
-XstartOnFirstThread \
-Dorg.lwjgl.opengl.Display.enableHighDPI=false \
-Dsun.java2d.uiScale=1 \
-jar foldl_macos.jar
Let me know if that doesn’t work and I’ll do some more digging.

