JFXPanel doesn't work with ES2, on Mac

After the fix for RT-11786 JFXPanel now works on MacOSX. However, Prism/J2D is the only pipeline available, while Prism/ES2 throws the following exception:

     [java] java.lang.NullPointerException
     [java] at com.sun.prism.es2.ES2RTTexture.create(ES2RTTexture.java:53)
     [java] at com.sun.prism.es2.ES2ResourceFactory.createRTTexture(ES2ResourceFactory.java:53)
     [java] at com.sun.javafx.tk.quantum.EmbeddedScene$PaintRunnable.run(EmbeddedScene.java:148)
     [java] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
     [java] at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
     [java] at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
     [java] at com.sun.prism.render.RenderJob.run(RenderJob.java:29)
     [java] at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
     [java] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
     [java] at com.sun.javafx.tk.quantum.QuantumRenderer$ObservedRunnable.run(QuantumRenderer.java:70)
     [java] at java.lang.Thread.run(Thread.java:680)

ES2RTTexture.java:53 is the following line:

        boolean pad = gl.isGLES2();

so obviously "gl" is null.

apps/experiments/SwingJavaFXChart is the application that can be used to reproduce this problem.