diff --git a/code/nel/include/nel/3d/driver.h b/code/nel/include/nel/3d/driver.h
index 2396d9d62..878db5c5d 100644
--- a/code/nel/include/nel/3d/driver.h
+++ b/code/nel/include/nel/3d/driver.h
@@ -187,7 +187,7 @@ public:
 	virtual void			setWindowTitle(const ucstring &title)=0;
 
 	/// Set the position of the NeL window
-	virtual void			setWindowPos(uint32 x, uint32 y)=0;
+	virtual void			setWindowPos(sint32 x, sint32 y)=0;
 
 	/// Show or hide the NeL window
 	virtual void			showWindow(bool show)=0;
@@ -748,7 +748,7 @@ public:
 	virtual void			getWindowSize (uint32 &width, uint32 &height) = 0;
 
 	/// Get the position of the window always (0,0) in fullscreen
-	virtual void			getWindowPos (uint32 &x, uint32 &y) = 0;
+	virtual void			getWindowPos (sint32 &x, sint32 &y) = 0;
 
 	/** get the RGBA back buffer. After swapBuffers(), the content of the back buffer is undefined.
 	  *
diff --git a/code/nel/include/nel/3d/driver_user.h b/code/nel/include/nel/3d/driver_user.h
index 1d2c2aaed..1bda23c27 100644
--- a/code/nel/include/nel/3d/driver_user.h
+++ b/code/nel/include/nel/3d/driver_user.h
@@ -149,7 +149,7 @@ public:
 	virtual void			setWindowTitle(const ucstring &title);
 
 	/// Set the position of the NeL window
-	virtual void			setWindowPos(uint32 x, uint32 y);
+	virtual void			setWindowPos(sint32 x, sint32 y);
 
 	/// Show or hide the NeL window
 	virtual void			showWindow(bool show);
@@ -396,7 +396,7 @@ public:
 	virtual void			getWindowSize (uint32 &width, uint32 &height);
 	virtual uint			getWindowWidth ();
 	virtual uint			getWindowHeight ();
-	virtual void			getWindowPos (uint32 &x, uint32 &y);
+	virtual void			getWindowPos (sint32 &x, sint32 &y);
 	virtual uint32			getAvailableVertexAGPMemory ();
 	virtual uint32			getAvailableVertexVRAMMemory ();
 	virtual void			getBuffer (CBitmap &bitmap);
diff --git a/code/nel/include/nel/3d/u_driver.h b/code/nel/include/nel/3d/u_driver.h
index 7641fdb2d..be77999c8 100644
--- a/code/nel/include/nel/3d/u_driver.h
+++ b/code/nel/include/nel/3d/u_driver.h
@@ -187,7 +187,7 @@ public:
 	virtual void			setWindowTitle(const ucstring &title)=0;
 
 	/// Set the position of the NeL window
-	virtual void			setWindowPos(uint32 x, uint32 y)=0;
+	virtual void			setWindowPos(sint32 x, sint32 y)=0;
 
 	/// Show or hide the NeL window
 	virtual void			showWindow(bool show = true)=0;
@@ -499,7 +499,7 @@ public:
 	virtual uint			getWindowHeight () =0;
 
 	/// Get the x and y coord of the windows always (0,0) in fullscreen
-	virtual void			getWindowPos (uint32 &x, uint32 &y) = 0;
+	virtual void			getWindowPos (sint32 &x, sint32 &y) = 0;
 
 	/** Return the amount of AGP memory allocated by initVertexArrayRange() to store vertices.
 	*/
diff --git a/code/nel/src/3d/driver.cpp b/code/nel/src/3d/driver.cpp
index b00c44388..9aefb3e51 100644
--- a/code/nel/src/3d/driver.cpp
+++ b/code/nel/src/3d/driver.cpp
@@ -34,7 +34,7 @@ namespace NL3D
 {
 
 // ***************************************************************************
-const uint32 IDriver::InterfaceVersion = 0x66; // added IEventEmitter::emulateMouseRawMode(bool)
+const uint32 IDriver::InterfaceVersion = 0x67; // changed window pos from uint32 to sint32
 
 // ***************************************************************************
 IDriver::IDriver() : _SyncTexDrvInfos( "IDriver::_SyncTexDrvInfos" )
diff --git a/code/nel/src/3d/driver/direct3d/driver_direct3d.cpp b/code/nel/src/3d/driver/direct3d/driver_direct3d.cpp
index 161a67e76..cbafa50a1 100644
--- a/code/nel/src/3d/driver/direct3d/driver_direct3d.cpp
+++ b/code/nel/src/3d/driver/direct3d/driver_direct3d.cpp
@@ -1817,7 +1817,7 @@ void CDriverD3D::getWindowSize (uint32 &width, uint32 &height)
 
 // ***************************************************************************
 
-void CDriverD3D::getWindowPos (uint32 &x, uint32 &y)
+void CDriverD3D::getWindowPos (sint32 &x, sint32 &y)
 {
 	H_AUTO_D3D(CDriverD3D_getWindowPos);
 	x = _WindowX;
@@ -2187,10 +2187,10 @@ void CDriverD3D::setWindowTitle(const ucstring &title)
 }
 
 // ***************************************************************************
-void CDriverD3D::setWindowPos(uint32 x, uint32 y)
+void CDriverD3D::setWindowPos(sint32 x, sint32 y)
 {
-	_WindowX = (sint32)x;
-	_WindowY = (sint32)y;
+	_WindowX = x;
+	_WindowY = y;
 	SetWindowPos(_HWnd, NULL, _WindowX, _WindowY, 0, 0, SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOSIZE);
 }
 
diff --git a/code/nel/src/3d/driver/direct3d/driver_direct3d.h b/code/nel/src/3d/driver/direct3d/driver_direct3d.h
index 1811b92ca..d9baa1b34 100644
--- a/code/nel/src/3d/driver/direct3d/driver_direct3d.h
+++ b/code/nel/src/3d/driver/direct3d/driver_direct3d.h
@@ -753,14 +753,14 @@ public:
 	virtual emptyProc		getWindowProc();
 	virtual NLMISC::IEventEmitter	*getEventEmitter();
 	virtual void			getWindowSize (uint32 &width, uint32 &height);
-	virtual void			getWindowPos (uint32 &x, uint32 &y);
+	virtual void			getWindowPos (sint32 &x, sint32 &y);
 	virtual uint8			getBitPerPixel ();
 
 	/// Set the title of the NeL window
 	virtual void			setWindowTitle(const ucstring &title);
 
 	/// Set the position of the NeL window
-	virtual void			setWindowPos(uint32 x, uint32 y);
+	virtual void			setWindowPos(sint32 x, sint32 y);
 
 	/// Show or hide the NeL window
 	virtual void			showWindow(bool show);
diff --git a/code/nel/src/3d/driver/opengl/driver_opengl.h b/code/nel/src/3d/driver/opengl/driver_opengl.h
index e8001014c..4543430b9 100644
--- a/code/nel/src/3d/driver/opengl/driver_opengl.h
+++ b/code/nel/src/3d/driver/opengl/driver_opengl.h
@@ -298,7 +298,7 @@ public:
 	virtual void			setWindowTitle(const ucstring &title);
 
 	/// Set the position of the NeL window
-	virtual void			setWindowPos(uint32 x, uint32 y);
+	virtual void			setWindowPos(sint32 x, sint32 y);
 
 	/// Show or hide the NeL window
 	virtual void			showWindow(bool show);
@@ -502,7 +502,7 @@ public:
 
 	virtual void			getWindowSize (uint32 &width, uint32 &height);
 
-	virtual void			getWindowPos (uint32 &x, uint32 &y);
+	virtual void			getWindowPos (sint32 &x, sint32 &y);
 
 	virtual void			getBuffer (CBitmap &bitmap);
 
diff --git a/code/nel/src/3d/driver/opengl/driver_opengl_window.cpp b/code/nel/src/3d/driver/opengl/driver_opengl_window.cpp
index a863a898b..03b3f5f79 100644
--- a/code/nel/src/3d/driver/opengl/driver_opengl_window.cpp
+++ b/code/nel/src/3d/driver/opengl/driver_opengl_window.cpp
@@ -862,7 +862,7 @@ bool CDriverGL::setScreenMode(const GfxMode &mode)
 
 #elif defined(NL_OS_MAC) && defined(NL_MAC_NATIVE)
 
-	// TODO
+	return NL3D::MAC::setMode(mode);
 
 #elif defined(NL_OS_UNIX)
 
@@ -1237,9 +1237,8 @@ bool CDriverGL::getCurrentScreenMode(GfxMode &mode)
 	mode.AntiAlias = _AntiAliasing;
 	
 #elif defined(NL_OS_MAC) && defined(NL_MAC_NATIVE)
-# warning "OpenGL Driver: Temporary Mac Implementation"
-	nlwarning("OpenGL Driver: Temporary Mac Implementation");
-	mode.Depth = 24;
+
+	NL3D::MAC::getCurrentScreenMode(mode);
 
 #elif defined(NL_OS_MAC)
 	/*
@@ -1309,10 +1308,10 @@ void CDriverGL::setWindowTitle(const ucstring &title)
 }
 
 // ***************************************************************************
-void CDriverGL::setWindowPos(uint32 x, uint32 y)
+void CDriverGL::setWindowPos(sint32 x, sint32 y)
 {
-	_WindowX = (sint32)x;
-	_WindowY = (sint32)y;
+	_WindowX = x;
+	_WindowY = y;
 
 #ifdef NL_OS_WINDOWS
 
@@ -1557,7 +1556,7 @@ void CDriverGL::getWindowSize(uint32 &width, uint32 &height)
 #endif // NL_OS_UNIX
 }
 
-void CDriverGL::getWindowPos(uint32 &x, uint32 &y)
+void CDriverGL::getWindowPos(sint32 &x, sint32 &y)
 {
 	H_AUTO_OGL(CDriverGL_getWindowPos)
 
@@ -1575,8 +1574,8 @@ void CDriverGL::getWindowPos(uint32 &x, uint32 &y)
 	{
 		if (_win)
 		{
-			x = (uint32)_WindowX;
-			y = (uint32)_WindowY;
+			x = _WindowX;
+			y = _WindowY;
 		}
 	}
 
diff --git a/code/nel/src/3d/driver/opengl/mac/cocoa_adapter.h b/code/nel/src/3d/driver/opengl/mac/cocoa_adapter.h
index 4f89f97eb..a2d0dddf6 100644
--- a/code/nel/src/3d/driver/opengl/mac/cocoa_adapter.h
+++ b/code/nel/src/3d/driver/opengl/mac/cocoa_adapter.h
@@ -58,14 +58,17 @@ bool setDisplay(nlWindow wnd, const GfxMode& mode, bool show, bool resizeable);
 /// mac specific stuff while calling CDriverGL::setMode()
 bool setMode(const GfxMode& mode);
 
+/// mac specific stuff while calling CDriverGL::getCurrentScreenMode()
+void getCurrentScreenMode(GfxMode& mode);
+
 /// mac specific stuff while calling CDriverGL::getWindowSize()
 void getWindowSize(uint32 &width, uint32 &height);
 
 /// mac specific stuff while calling CDriverGL::getWindowPos()
-void getWindowPos(uint32 &x, uint32 &y);
+void getWindowPos(sint32 &x, sint32 &y);
 
 /// mac specific stuff while calling CDriverGL::setWindowPos()
-void setWindowPos(uint32 x, uint32 y);
+void setWindowPos(sint32 x, sint32 y);
 
 /// mac specific stuff while calling CDriverGL::setWindowTitle()
 void setWindowTitle(const ucstring &title);
diff --git a/code/nel/src/3d/driver/opengl/mac/cocoa_adapter.mm b/code/nel/src/3d/driver/opengl/mac/cocoa_adapter.mm
index c236cc9d2..212a7f077 100644
--- a/code/nel/src/3d/driver/opengl/mac/cocoa_adapter.mm
+++ b/code/nel/src/3d/driver/opengl/mac/cocoa_adapter.mm
@@ -237,11 +237,36 @@ bool setMode(const GfxMode& mode)
 	return true;
 }
 
+void getCurrentScreenMode(GfxMode& mode)
+{
+	// the sceen with the menu bar
+	NSScreen* screen = [[NSScreen screens] objectAtIndex:0];
+
+	mode.OffScreen = false;
+	mode.Frequency = 0;
+	mode.Depth     = NSBitsPerPixelFromDepth([screen depth]);
+
+	// in fullscreen mode
+	if([g_glview isInFullScreenMode])
+	{
+		// return the size of the back buffer (like having switched monitor mode)
+		mode.Windowed  = false;
+		mode.Width     = (uint16)g_bufferSize[0];
+		mode.Height    = (uint16)g_bufferSize[1];
+	}
+	
+	// in windowes mode
+	else
+	{
+		// return the size of the screen with menu bar
+		mode.Windowed  = true;
+		mode.Width     = (uint16)[screen frame].size.width;
+		mode.Height    = (uint16)[screen frame].size.height;
+	}
+}
+
 void getWindowSize(uint32 &width, uint32 &height)
 {
-	if(!g_glctx)
-		return;
-
 	// A cocoa fullscreen view stays at the native resolution of the display.
 	// When changing the rendering resolution, the size of the back buffer gets
 	// changed, but the view still stays at full resolution. So the scaling of
@@ -313,10 +338,17 @@ void getWindowSize(uint32 &width, uint32 &height)
 #endif
 }
 
-void getWindowPos(uint32 &x, uint32 &y)
+void getWindowPos(sint32 &x, sint32 &y)
 {
-	// get the rect (position, size) of the screen
-	NSRect screenRect = [[g_window screen] frame];
+	// for IDriver conformity
+	if([g_glview isInFullScreenMode])
+	{
+		x = y = 0;
+		return;
+	}
+	
+	// get the rect (position, size) of the screen with menu bar
+	NSRect screenRect = [[[NSScreen screens] objectAtIndex:0] frame];
 
 	// get the rect (position, size) of the window
 	NSRect windowRect = [g_window frame];
@@ -328,12 +360,12 @@ void getWindowPos(uint32 &x, uint32 &y)
 	y = screenRect.size.height - windowRect.size.height - windowRect.origin.y;
 }
 
-void setWindowPos(uint32 x, uint32 y)
+void setWindowPos(sint32 x, sint32 y)
 {
-	// get the size of the screen
-	NSRect screenRect = [[g_window screen] frame];
+	// get the rect (position, size) of the screen with menu bar
+	NSRect screenRect = [[[NSScreen screens] objectAtIndex:0] frame];
 
-	// get the size of the window
+	// get the rect (position, size) of the window
 	NSRect windowRect = [g_window frame];
 
 	// convert y from NeL coordinates to cocoa coordinates
diff --git a/code/nel/src/3d/driver_user.cpp b/code/nel/src/3d/driver_user.cpp
index 255d3e4ed..5afebf8e3 100644
--- a/code/nel/src/3d/driver_user.cpp
+++ b/code/nel/src/3d/driver_user.cpp
@@ -328,7 +328,7 @@ void CDriverUser::setWindowTitle(const ucstring &title)
 }
 
 // ***************************************************************************
-void CDriverUser::setWindowPos(uint32 x, uint32 y)
+void CDriverUser::setWindowPos(sint32 x, sint32 y)
 {
 	NL3D_HAUTO_UI_DRIVER;
 	_Driver->setWindowPos(x, y);
@@ -1530,7 +1530,7 @@ uint			CDriverUser::getWindowHeight ()
 	_Driver->getWindowSize (width, height);
 	return height;
 }
-void			CDriverUser::getWindowPos (uint32 &x, uint32 &y)
+void			CDriverUser::getWindowPos (sint32 &x, sint32 &y)
 {
 	NL3D_HAUTO_UI_DRIVER;
 
diff --git a/code/ryzom/client/src/client_cfg.cpp b/code/ryzom/client/src/client_cfg.cpp
index 7e927717b..87d4f038c 100644
--- a/code/ryzom/client/src/client_cfg.cpp
+++ b/code/ryzom/client/src/client_cfg.cpp
@@ -2009,7 +2009,8 @@ void CClientConfig::release ()
 			// Driver still alive ?
 			if (Driver && Driver->isActive ())
 			{
-				uint32 x, y, width, height;
+				sint32 x, y;
+				uint32 width, height;
 
 				Driver->getWindowPos(x, y);
 				Driver->getWindowSize(width, height);
diff --git a/code/ryzom/client/src/client_cfg.h b/code/ryzom/client/src/client_cfg.h
index 196374712..33a20fa63 100644
--- a/code/ryzom/client/src/client_cfg.h
+++ b/code/ryzom/client/src/client_cfg.h
@@ -61,8 +61,8 @@ struct CClientConfig
 	bool			SaveConfig;
 
 	/// Window position in windowed mode
-	sint			PositionX;
-	sint			PositionY;
+	sint32		PositionX;
+	sint32		PositionY;
 
 	/// Window frequency
 	uint			Frequency;
diff --git a/code/ryzom/client/src/init.cpp b/code/ryzom/client/src/init.cpp
index a232b835f..fe6fd7f8e 100644
--- a/code/ryzom/client/src/init.cpp
+++ b/code/ryzom/client/src/init.cpp
@@ -908,7 +908,7 @@ void prelogInit()
 		// Set the title
 		Driver->setWindowTitle(CI18N::get("TheSagaOfRyzom"));
 
-		uint32 posX = 0, posY = 0;
+		sint32 posX = 0, posY = 0;
 
 		if (ClientCfg.Windowed)
 		{