diff --git a/examples/CommonInterfaces/CommonWindowInterface.h b/examples/CommonInterfaces/CommonWindowInterface.h
index fb3b574e9..346fdac72 100644
--- a/examples/CommonInterfaces/CommonWindowInterface.h
+++ b/examples/CommonInterfaces/CommonWindowInterface.h
@@ -119,7 +119,9 @@ class CommonWindowInterface
 
 		virtual	float	getRetinaScale() const =0;
 		virtual	void	setAllowRetina(bool allow) =0;
-	
+
+        virtual int   getWidth() const = 0;
+        virtual int   getHeight() const = 0;
 
         virtual int fileOpenDialog(char* fileName, int maxFileNameLength) = 0;
     
diff --git a/examples/ExampleBrowser/OpenGLExampleBrowser.cpp b/examples/ExampleBrowser/OpenGLExampleBrowser.cpp
index d8756f67e..c07e63a7c 100644
--- a/examples/ExampleBrowser/OpenGLExampleBrowser.cpp
+++ b/examples/ExampleBrowser/OpenGLExampleBrowser.cpp
@@ -695,8 +695,8 @@ bool OpenGLExampleBrowser::init(int argc, char* argv[])
 	}
 		
 	
-	int width = 1024;
-    int height=768;
+	int width = 1920;
+    int height=1080;
 #ifndef NO_OPENGL3
     SimpleOpenGL3App* simpleApp=0;
 	sUseOpenGL2 =args.CheckCmdLineFlag("opengl2");
@@ -723,6 +723,8 @@ bool OpenGLExampleBrowser::init(int argc, char* argv[])
 		char title[1024];
 		sprintf(title,"%s using OpenGL3+. %s", appTitle,optMode);
         simpleApp = new SimpleOpenGL3App(title,width,height, gAllowRetina);
+
+        
         s_app = simpleApp;
     }
 #endif
@@ -734,7 +736,11 @@ bool OpenGLExampleBrowser::init(int argc, char* argv[])
    #endif 
    
     s_instancingRenderer = s_app->m_renderer;
-	s_window  = s_app->m_window;
+    s_window  = s_app->m_window;
+
+    width = s_window->getWidth();
+    height = s_window->getHeight();
+    
 	prevMouseMoveCallback  = s_window->getMouseMoveCallback();
 	s_window->setMouseMoveCallback(MyMouseMoveCallback);
 	
@@ -817,9 +823,7 @@ bool OpenGLExampleBrowser::init(int argc, char* argv[])
 
 	///add some demos to the gAllExamples
 
-	
-	
-
+    
 	int numDemos = gAllExamples->getNumRegisteredExamples();
 
 	//char nodeText[1024];
@@ -924,7 +928,7 @@ bool OpenGLExampleBrowser::init(int argc, char* argv[])
 	
     gui->registerFileOpenCallback(fileOpenCallback);
 	gui->registerQuitCallback(quitCallback);
-    
+   
 	return true;
 }
 
diff --git a/examples/OpenGLWindow/MacOpenGLWindow.h b/examples/OpenGLWindow/MacOpenGLWindow.h
index f17102a8b..d84b031b4 100644
--- a/examples/OpenGLWindow/MacOpenGLWindow.h
+++ b/examples/OpenGLWindow/MacOpenGLWindow.h
@@ -101,6 +101,9 @@ public:
 	virtual	float	getTimeInSeconds();
 	
 
+    virtual int   getWidth() const;
+    virtual int   getHeight() const;
+
 	
 	virtual void setRenderCallback( b3RenderCallback renderCallback);
 	
diff --git a/examples/OpenGLWindow/MacOpenGLWindow.mm b/examples/OpenGLWindow/MacOpenGLWindow.mm
index 818726971..d247f95b0 100644
--- a/examples/OpenGLWindow/MacOpenGLWindow.mm
+++ b/examples/OpenGLWindow/MacOpenGLWindow.mm
@@ -423,8 +423,8 @@ void MacOpenGLWindow::createWindow(const b3gWindowConstructionInfo& ci)
     [m_internalData->m_window makeKeyAndOrderFront: nil];
     
     [m_internalData->m_myview MakeCurrent];
-    //m_internalData->m_width = m_internalData->m_myview.GetWindowWidth;
-    //m_internalData->m_height = m_internalData->m_myview.GetWindowHeight;
+    m_internalData->m_width = m_internalData->m_myview.GetWindowWidth;
+    m_internalData->m_height = m_internalData->m_myview.GetWindowHeight;
     
     
     [NSApp activateIgnoringOtherApps:YES];
@@ -1132,6 +1132,21 @@ void MacOpenGLWindow::getMouseCoordinates(int& x, int& y)
     
 }
 
+int   MacOpenGLWindow::getWidth() const
+{
+    if (m_internalData && m_internalData->m_myview && m_internalData->m_myview.GetWindowWidth)
+        return m_internalData->m_myview.GetWindowWidth;
+    return 0;
+}
+
+int   MacOpenGLWindow::getHeight() const
+{
+    if (m_internalData && m_internalData->m_myview && m_internalData->m_myview.GetWindowHeight)
+        return m_internalData->m_myview.GetWindowHeight;
+    return 0;
+}
+
+
 void MacOpenGLWindow::setResizeCallback(b3ResizeCallback resizeCallback)
 {
     [m_internalData->m_myview setResizeCallback:resizeCallback];
diff --git a/examples/OpenGLWindow/SimpleOpenGL3App.cpp b/examples/OpenGLWindow/SimpleOpenGL3App.cpp
index 241ff7bba..d77c12bef 100644
--- a/examples/OpenGLWindow/SimpleOpenGL3App.cpp
+++ b/examples/OpenGLWindow/SimpleOpenGL3App.cpp
@@ -56,8 +56,11 @@ static void SimpleResizeCallback( float widthf, float heightf)
 {
 	int width = (int)widthf;
 	int height = (int)heightf;
-	gApp->m_instancingRenderer->resize(width,height);
-	gApp->m_primRenderer->setScreenSize(width,height);
+    if (gApp && gApp->m_instancingRenderer)
+        gApp->m_instancingRenderer->resize(width,height);
+
+    if (gApp && gApp->m_primRenderer)
+        gApp->m_primRenderer->setScreenSize(width,height);
 
 }
 
@@ -115,6 +118,7 @@ extern unsigned char OpenSansData[];
 SimpleOpenGL3App::SimpleOpenGL3App(	const char* title, int width,int height, bool allowRetina)
 {
 	gApp = this;
+
 	m_data = new SimpleInternalData;
 	m_data->m_frameDumpPngFileName = 0;
 	m_data->m_renderTexture = 0;
@@ -123,6 +127,7 @@ SimpleOpenGL3App::SimpleOpenGL3App(	const char* title, int width,int height, boo
 	m_data->m_upAxis = 1;
 
 	m_window = new b3gDefaultOpenGLWindow();
+   
 	m_window->setAllowRetina(allowRetina);
 	
 	b3gWindowConstructionInfo ci;
@@ -141,6 +146,9 @@ SimpleOpenGL3App::SimpleOpenGL3App(	const char* title, int width,int height, boo
 					1.f);
 	
 	m_window->startRendering();
+    width = m_window->getWidth();
+    height = m_window->getHeight();
+    
 	b3Assert(glGetError() ==GL_NO_ERROR);
 
 #ifndef __APPLE__
@@ -160,17 +168,21 @@ SimpleOpenGL3App::SimpleOpenGL3App(	const char* title, int width,int height, boo
 
     b3Assert(glGetError() ==GL_NO_ERROR);
 
-	m_primRenderer = new GLPrimitiveRenderer(width,height);
 	m_parameterInterface = 0;
-
+    
     b3Assert(glGetError() ==GL_NO_ERROR);
 
 	m_instancingRenderer = new GLInstancingRenderer(128*1024,64*1024*1024);
-	m_renderer = m_instancingRenderer ;
-	m_instancingRenderer->init();
+    m_primRenderer = new GLPrimitiveRenderer(width,height);
+    
+    m_renderer = m_instancingRenderer ;
+    m_window->setResizeCallback(SimpleResizeCallback);
+    
+    
+    m_instancingRenderer->init();
 	m_instancingRenderer->resize(width,height);
-
-	b3Assert(glGetError() ==GL_NO_ERROR);
+    m_primRenderer->setScreenSize(width,height);
+    b3Assert(glGetError() ==GL_NO_ERROR);
 
 	m_instancingRenderer->InitShaders();
 
@@ -178,8 +190,7 @@ SimpleOpenGL3App::SimpleOpenGL3App(	const char* title, int width,int height, boo
 	m_window->setMouseButtonCallback(SimpleMouseButtonCallback);
     m_window->setKeyboardCallback(SimpleKeyboardCallback);
     m_window->setWheelCallback(SimpleWheelCallback);
-	m_window->setResizeCallback(SimpleResizeCallback);
-
+	
 	TwGenerateDefaultFonts();
 	m_data->m_fontTextureId = BindFont(g_DefaultNormalFont);
 	m_data->m_largeFontTextureId = BindFont(g_DefaultLargeFont);