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diff --git a/src/SFML/Window/OSX/Scaling.h b/src/SFML/Window/OSX/Scaling.h
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+////////////////////////////////////////////////////////////
+//
+// SFML - Simple and Fast Multimedia Library
+// Copyright (C) 2007-2016 Marco Antognini (antognini.marco@gmail.com),
+//                         Laurent Gomila (laurent@sfml-dev.org)
+//
+// This software is provided 'as-is', without any express or implied warranty.
+// In no event will the authors be held liable for any damages arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it freely,
+// subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented;
+//    you must not claim that you wrote the original software.
+//    If you use this software in a product, an acknowledgment
+//    in the product documentation would be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such,
+//    and must not be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source distribution.
+//
+////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////
+// Headers
+////////////////////////////////////////////////////////////
+#import <SFML/Window/OSX/WindowImplDelegateProtocol.h>
+
+#import <AppKit/AppKit.h>
+
+namespace sf
+{
+namespace priv
+{
+
+////////////////////////////////////////////////////////////
+/// \brief Get the scale factor of the main screen
+///
+////////////////////////////////////////////////////////////
+inline CGFloat getDefaultScaleFactor()
+{
+    return [[NSScreen mainScreen] backingScaleFactor];
+}
+
+////////////////////////////////////////////////////////////
+/// \brief Scale SFML coordinates to backing coordinates
+///
+/// \param in SFML coordinates to be converted
+/// \param delegate an object implementing WindowImplDelegateProtocol, or nil for default scale
+///
+////////////////////////////////////////////////////////////
+template <class T>
+void scaleIn(T& in, id<WindowImplDelegateProtocol> delegate)
+{
+    in /= delegate ? [delegate displayScaleFactor] : getDefaultScaleFactor();
+}
+
+template <class T>
+void scaleInWidthHeight(T& in, id<WindowImplDelegateProtocol> delegate)
+{
+    scaleIn(in.width, delegate);
+    scaleIn(in.height, delegate);
+}
+
+template <class T>
+void scaleInXY(T& in, id<WindowImplDelegateProtocol> delegate)
+{
+    scaleIn(in.x, delegate);
+    scaleIn(in.y, delegate);
+}
+
+////////////////////////////////////////////////////////////
+/// \brief Scale backing coordinates to SFML coordinates
+///
+/// \param out backing coordinates to be converted
+/// \param delegate an object implementing WindowImplDelegateProtocol, or nil for default scale
+///
+////////////////////////////////////////////////////////////
+template <class T>
+void scaleOut(T& out, id<WindowImplDelegateProtocol> delegate)
+{
+    out *= delegate ? [delegate displayScaleFactor] : getDefaultScaleFactor();
+}
+
+template <class T>
+void scaleOutWidthHeight(T& out, id<WindowImplDelegateProtocol> delegate)
+{
+    scaleOut(out.width, delegate);
+    scaleOut(out.height, delegate);
+}
+
+template <class T>
+void scaleOutXY(T& out, id<WindowImplDelegateProtocol> delegate)
+{
+    scaleOut(out.x, delegate);
+    scaleOut(out.y, delegate);
+}
+
+} // namespace priv
+} // namespace sf
+