Results 3 issues of Michael

Not using the gdx-lwjgl3-glfw-awt library and using JVM opts "-XstartOnFirstThread" fixes the issue. - [ X] macOS

bug
glfw-awt-macos

I realised that the ScreenUtils/clear method does not give me the possibility to pass a Graphics instance myself. (I prefer to not use global state and write libgdx via clojure,...