diff -rupN include/wx/glcanvas.h include/wx/glcanvas.h
--- include/wx/glcanvas.h	2015-05-21 00:36:27.406145182 +0200
+++ include/wx/glcanvas.h	2015-05-21 00:37:59.169474782 +0200
@@ -19,6 +19,8 @@
 #include "wx/palette.h"
 #include "wx/window.h"
 
+#define RETINA_OPENGL_PATCH
+
 class WXDLLIMPEXP_FWD_GL wxGLCanvas;
 class WXDLLIMPEXP_FWD_GL wxGLContext;
 
diff -rupN include/wx/osx/glcanvas.h include/wx/osx/glcanvas.h
--- include/wx/osx/glcanvas.h	2015-05-21 00:36:27.419478515 +0200
+++ include/wx/osx/glcanvas.h	2015-05-21 00:36:37.319478112 +0200
@@ -88,6 +88,9 @@ public:
     // update the view port of the current context to match this window
     void SetViewport();
 
+    void SetViewWantsBestResolution( bool aValue );
+    bool GetViewWantsBestResolution();
+    float GetBackingScaleFactor();
 
     // deprecated methods
     // ------------------
diff -rupN src/osx/cocoa/glcanvas.mm src/osx/cocoa/glcanvas.mm
--- src/osx/cocoa/glcanvas.mm	2015-05-21 00:36:27.542811843 +0200
+++ src/osx/cocoa/glcanvas.mm	2015-05-21 00:36:37.322811445 +0200
@@ -313,6 +313,22 @@ bool wxGLCanvas::SwapBuffers()
     return true;
 }
 
+void wxGLCanvas::SetViewWantsBestResolution( bool aValue )
+{
+    [GetHandle() setWantsBestResolutionOpenGLSurface:aValue];
+}
+
+bool wxGLCanvas::GetViewWantsBestResolution()
+{
+    return [GetHandle() wantsBestResolutionOpenGLSurface];
+}
+
+float wxGLCanvas::GetBackingScaleFactor()
+{
+    return [[GetHandle() window] backingScaleFactor];
+}
+
+
 bool wxGLContext::SetCurrent(const wxGLCanvas& win) const
 {
     if ( !m_glContext )