Index: OpenSceneGraph/trunk/include/osgViewer/api/Cocoa/PixelBufferCocoa
===================================================================
--- OpenSceneGraph/trunk/include/osgViewer/api/Cocoa/PixelBufferCocoa (revision 10858)
+++ OpenSceneGraph/trunk/include/osgViewer/api/Cocoa/PixelBufferCocoa (revision 10887)
@@ -21,16 +21,10 @@
 #include <osg/GraphicsContext>
 #include <osgViewer/Export>
-
-
-#ifdef __OBJC__
-@class NSOpenGLContext;
-#else
-class NSOpenGLContext;
-#endif
+#include <osgViewer/api/Cocoa/GraphicsHandleCocoa>
 
 namespace osgViewer
 {
 
-class OSGVIEWER_EXPORT PixelBufferCocoa : public osg::GraphicsContext
+class OSGVIEWER_EXPORT PixelBufferCocoa : public osg::GraphicsContext, public osgViewer::GraphicsHandleCocoa
 {
     public:
@@ -38,4 +32,6 @@
 
         PixelBufferCocoa(osg::GraphicsContext::Traits* traits):
+            osg::GraphicsContext(),
+            osgViewer::GraphicsHandleCocoa(),
             _valid(false),
             _initialized(false),