Index: /trunk/src/VBox/HostServices/SharedOpenGL/render/renderspu_cocoa_helper.m
===================================================================
--- /trunk/src/VBox/HostServices/SharedOpenGL/render/renderspu_cocoa_helper.m	(revision 40702)
+++ /trunk/src/VBox/HostServices/SharedOpenGL/render/renderspu_cocoa_helper.m	(revision 40703)
@@ -1688,5 +1688,5 @@
     if (pFmt)
     {
-        *ppCtx = [[OverlayOpenGLContext alloc] initWithFormat:pFmt shareContext:nil];
+        *ppCtx = [[OverlayOpenGLContext alloc] initWithFormat:pFmt shareContext:pSharedCtx];
 
         /* Enable multi threaded OpenGL engine */