What is expected : When starting a SimpleApplication JMonkeyEngine would spawn a thread for internal processing with an option to "waitFor" block until started.

What is observered: The calling thread is endlessly blocked by calling the run() method directly - with a note ...
// NOTE: this is required for Mac OS X!
https://github.com/jMonkeyEngine/jmonkeyengine/blob/v3.2.3-stable/jme3-lwjgl3/src/main/java/com/jme3/system/lwjgl/LwjglWindow.java#L420-L423

PR submitted - #1513