Posted by ac on Nov 11, 2012; 9:26pm
URL: https://forum.jogamp.org/Enabling-Stencil-buffer-breaks-rendering-OSX-R11-tp4026857p4026863.html

I see the following line:

// capabilities.setStencilBits(8); // No Stencil on OSX w/ hw-accel !

in TestGLCanvasAWTActionDeadlock02AWT. But the stencil buffer used to work on OSX until recently, as far as I remember...