GLException Not a GL3 implementation on MacOSX

[silicontrip]

I get no 3d rendering of the tool path and I get the following error when starting Goko from the command line.

I've tried this on OSX 10.9 and 10.11

Exception in thread "main-FPSAnimator-Timer0" javax.media.opengl.GLException: Not a GL3 implementation
	at jogamp.opengl.gl4.GL4bcImpl.getGL3(GL4bcImpl.java:37119)
	at org.goko.tools.viewer.jogl.service.JoglSceneManager.init(JoglSceneManager.java:297)
	at jogamp.opengl.GLDrawableHelper.init(GLDrawableHelper.java:540)
	at jogamp.opengl.GLDrawableHelper.init(GLDrawableHelper.java:562)
	at com.jogamp.opengl.swt.GLCanvas$1.run(GLCanvas.java:133)
	at jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:1032)
	at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:909)
	at com.jogamp.opengl.swt.GLCanvas$3.run(GLCanvas.java:161)
	at com.jogamp.opengl.swt.GLCanvas.runInGLThread(GLCanvas.java:855)
	at com.jogamp.opengl.swt.GLCanvas.display(GLCanvas.java:572)
	at com.jogamp.opengl.util.DefaultAnimatorImpl.display(DefaultAnimatorImpl.java:50)
	at com.jogamp.opengl.util.AnimatorBase.display(AnimatorBase.java:440)
	at com.jogamp.opengl.util.FPSAnimator$MainTask.run(FPSAnimator.java:167)
	at java.util.TimerThread.mainLoop(Timer.java:555)
	at java.util.TimerThread.run(Timer.java:505)

Any Help would be appreciated.
Thanks
Mark