Index: Rendering/vtkCarbonRenderWindow.cxx
===================================================================
RCS file: /cvsroot/VTK/VTK/Rendering/vtkCarbonRenderWindow.cxx,v
retrieving revision 1.74
diff -u -r1.74 vtkCarbonRenderWindow.cxx
--- Rendering/vtkCarbonRenderWindow.cxx	2 Jan 2009 18:51:03 -0000	1.74
+++ Rendering/vtkCarbonRenderWindow.cxx	12 Jan 2009 16:07:14 -0000
@@ -446,7 +446,11 @@
       }
     
     // Associate the OpenGL context with the control's window, and establish the buffer rect.
+#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1050
+    aglSetWindowRef(this->ContextId, this->GetRootWindow());
+#else
     aglSetDrawable(this->ContextId, GetWindowPort(this->GetRootWindow()));
+#endif
     aglSetInteger(this->ContextId, AGL_BUFFER_RECT, bufferRect);
     aglEnable(this->ContextId, AGL_BUFFER_RECT);
   
@@ -752,8 +756,13 @@
     return;
     }
 
+#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1050
+  // attach the WindowRef to the context
+  if (!aglSetWindowRef (this->ContextId, this->GetRootWindow()))
+#else
   // attach the CGrafPtr to the context
   if (!aglSetDrawable (this->ContextId, GetWindowPort (this->GetRootWindow())))
+#endif
     {
     aglReportError();
     return;