diff --git a/CMakeLists.txt b/CMakeLists.txt
index 60ee6000597ccf0e6688d910794352679249cbd0..0b1fdfdc26a2c1efa679eb8ed457bb6eb74762e6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -135,6 +135,7 @@ IF(APPLE)
 	SET(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,-undefined -Wl,dynamic_lookup")
 	SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DMAC_OSX")
 	SET(CMAKE_OSX_ARCHITECTURES x86_64)
+	SET (CGoGN_EXT_LIBS ${CGoGN_EXT_LIBS} "-framework Foundation -framework cocoa" )
 ENDIF(APPLE)
 
 IF(WIN32)
diff --git a/include/Algo/Modelisation/extrusion.hpp b/include/Algo/Modelisation/extrusion.hpp
index d3d80bfa734c6ec39eb1a02ad43b2168a4809ab1..b03f99576996b9f01733a54412a8eb6bcef2e1ae 100644
--- a/include/Algo/Modelisation/extrusion.hpp
+++ b/include/Algo/Modelisation/extrusion.hpp
@@ -22,7 +22,7 @@
 *                                                                              *
 *******************************************************************************/
 
-#include <GL/glew.h>
+#include "Utils/gl_def.h"
 #include "Geometry/transfo.h"
 
 namespace CGoGN
diff --git a/include/Algo/Render/GL2/colorPerFaceRender.h b/include/Algo/Render/GL2/colorPerFaceRender.h
index 83f61d07439db747182e3e4f541b8a64a4611429..b8f34bfcf8628d8c50e5651ae74a0f470dd0c8ce 100644
--- a/include/Algo/Render/GL2/colorPerFaceRender.h
+++ b/include/Algo/Render/GL2/colorPerFaceRender.h
@@ -25,7 +25,6 @@
 #ifndef _COLOR_PER_FACE_RENDER
 #define _COLOR_PER_FACE_RENDER
 
-#include <GL/glew.h>
 
 #include "Topology/generic/dart.h"
 #include "Topology/generic/attributeHandler.h"
diff --git a/include/Algo/Render/GL2/explodeVolumeRender.h b/include/Algo/Render/GL2/explodeVolumeRender.h
index 85a183977bf3a599b99b1b2f0cb30a28efd209cf..7247baad178197279a9ceddae631462b8d921fa7 100644
--- a/include/Algo/Render/GL2/explodeVolumeRender.h
+++ b/include/Algo/Render/GL2/explodeVolumeRender.h
@@ -25,8 +25,6 @@
 #ifndef _EXPLODE_VOLUME_VBO_RENDER
 #define _EXPLODE_VOLUME_VBO_RENDER
 
-#include <GL/glew.h>
-
 #include <vector>
 #include <list>
 
diff --git a/include/Algo/Render/GL2/mapRender.h b/include/Algo/Render/GL2/mapRender.h
index 5360cf532331fec062ca60c0456fcc31b9ce01c7..7003a3514f63c7007dd8b3985d8de2358b4869bf 100644
--- a/include/Algo/Render/GL2/mapRender.h
+++ b/include/Algo/Render/GL2/mapRender.h
@@ -28,7 +28,6 @@
 #define _USE_MATH_DEFINES
 #include <cmath>
 
-#include <GL/glew.h>
 #include <vector>
 #include <list>
 #include <set>
diff --git a/include/Algo/Render/GL2/topo3Render.h b/include/Algo/Render/GL2/topo3Render.h
index bddea0881b9c81c8ee4ee0e78fac084d67813fed..72141e64611c759f9353d170974db32d75ccf369 100644
--- a/include/Algo/Render/GL2/topo3Render.h
+++ b/include/Algo/Render/GL2/topo3Render.h
@@ -25,8 +25,6 @@
 #ifndef _TOPO3_VBO_RENDER
 #define _TOPO3_VBO_RENDER
 
-#include <GL/glew.h>
-
 #include <vector>
 #include <list>
 
diff --git a/include/Algo/Render/GL2/topoRender.h b/include/Algo/Render/GL2/topoRender.h
index 44c5aae108d736fca73cd46ea1258d0a64560a66..77234dedff0521e3b943c9ba8ff508a57f36f4e6 100644
--- a/include/Algo/Render/GL2/topoRender.h
+++ b/include/Algo/Render/GL2/topoRender.h
@@ -25,8 +25,6 @@
 #ifndef _GL2_TOPO_RENDER_
 #define _GL2_TOPO_RENDER_
 
-#include <GL/glew.h>
-
 #include <vector>
 #include <list>
 
diff --git a/include/Utils/Qt/macgl3.h b/include/Utils/Qt/macgl3.h
new file mode 100644
index 0000000000000000000000000000000000000000..ce3ab7115fd035ada74854d4e2a8946c5417c3fb
--- /dev/null
+++ b/include/Utils/Qt/macgl3.h
@@ -0,0 +1,25 @@
+//#include <QApplication>
+#include <QGLWidget>
+#include <QGLContext>
+#include <iostream>
+
+//external Objective C function
+void* select_3_2_mac_visual(GDHandle handle);
+
+namespace CGoGN
+{
+
+/// Use with  GLWidget(...):QGLWidget(new Core3_2_context(QGLFormat::defaultFormat()))
+/// check with std::cout<<glGetString(GL_VERSION)<<std::endl;
+struct Core3_2_context : public QGLContext
+{
+	Core3_2_context(const QGLFormat& format, QPaintDevice* device) : QGLContext(format,device) {}
+	Core3_2_context(const QGLFormat& format) : QGLContext(format) {}
+
+	virtual void* chooseMacVisual(GDHandle handle)
+	{
+		return select_3_2_mac_visual(handle);
+	}
+};
+
+}
diff --git a/include/Utils/Qt/qtgl.h b/include/Utils/Qt/qtgl.h
index 9a562c8689f7add8a9fbe80be30ba7289989574a..6bc654741d3fd12ae92f31a51c60c70eb496756a 100644
--- a/include/Utils/Qt/qtgl.h
+++ b/include/Utils/Qt/qtgl.h
@@ -25,7 +25,7 @@
 #ifndef __QT_GL2__
 #define __QT_GL2__
 
-#include <GL/glew.h>
+#include "Utils/gl_def.h"
 #include <QGLWidget>
 #include <QMouseEvent>
 #include <QKeyEvent>
diff --git a/include/Utils/drawer.h b/include/Utils/drawer.h
index 9579e6de80848a95efe808f88a470d1ad988263a..bed58d31a86c3ccf65a1279a39d3d96955dd3ebc 100644
--- a/include/Utils/drawer.h
+++ b/include/Utils/drawer.h
@@ -26,7 +26,7 @@
 #define _CGOGN_DRAWER_H_
 
 #include <vector>
-#include <GL/glew.h>
+#include "Utils/gl_def.h"
 #include "Geometry/vector_gen.h"
 
 namespace CGoGN { namespace Utils { class VBO; } }
diff --git a/include/Utils/fbo.h b/include/Utils/fbo.h
index f9c91960655b2792da1387053337573536685bdd..98865b281218ea8bcd2d0b96bf8ab2f79d8ac384 100644
--- a/include/Utils/fbo.h
+++ b/include/Utils/fbo.h
@@ -25,7 +25,6 @@
 #ifndef __CGoGN_GLSL_FBO__
 #define __CGoGN_GLSL_FBO__
 
-#include <GL/glew.h>
 #include "Utils/gl_def.h"
 
 #include <iostream>
diff --git a/include/Utils/textures.h b/include/Utils/textures.h
index e3577a8a1d7deccc1f033db678109a8bc25aa751..422a81f13115304df0f390ce3cefac9df0002cac 100644
--- a/include/Utils/textures.h
+++ b/include/Utils/textures.h
@@ -27,7 +27,6 @@
 
 #include "Utils/gl_def.h"
 #include "Geometry/vector_gen.h"
-#include <GL/glew.h>
 #include <string>
 #include <QImage>
 
diff --git a/include/Utils/vbo.h b/include/Utils/vbo.h
index e6aae9488333c454f080c094167ebed660885505..48076c799747d45ed4d73d542b2d1bebc2e28bef 100644
--- a/include/Utils/vbo.h
+++ b/include/Utils/vbo.h
@@ -27,7 +27,6 @@
 
 
 #include <vector>
-#include <GL/glew.h>
 #include "Utils/gl_def.h"
 #include "Topology/generic/attributeHandler.h"
 #include "Container/convert.h"
diff --git a/include/Utils/vboRender.h b/include/Utils/vboRender.h
index fd1944257547851c682ee6be25c6bb3806235dce..a07c18c1a5c2e7cc2b7758c73f00d169a1b60b51 100644
--- a/include/Utils/vboRender.h
+++ b/include/Utils/vboRender.h
@@ -25,7 +25,7 @@
 #ifndef _VBO_RENDER_
 #define _VBO_RENDER_
 
-#include <GL/glew.h>
+#include "Utils/gl_def.h"
 
 namespace CGoGN
 {
diff --git a/src/Utils/Qt/qtgl.cpp b/src/Utils/Qt/qtgl.cpp
index 77db9edcdbcd34576e32d8c811ab27b71af8d3fb..8b8214ecf106972d61bcb7da6c2c62cb09311db2 100644
--- a/src/Utils/Qt/qtgl.cpp
+++ b/src/Utils/Qt/qtgl.cpp
@@ -22,7 +22,6 @@
 *                                                                              *
 *******************************************************************************/
 
-#include <GL/glew.h>
 #include <iostream>
 #include "Utils/trackball.h"
 #include "Utils/Qt/qtgl.h"
@@ -30,6 +29,9 @@
 #include "glm/gtc/type_precision.hpp"
 #include "Utils/GLSLShader.h"
 
+#ifdef MAC_OSX
+  #include "Utils/Qt/macgl3.h"
+#endif
 namespace CGoGN
 {
 
@@ -42,7 +44,12 @@ namespace QT
 float GLWidget::FAR_PLANE = 500.0f;
 
 GLWidget::GLWidget(SimpleQT* cbs, QWidget *parent) :
+#ifdef MAC_OSX
+//	QGLWidget(new Core3_2_context(QGLFormat::defaultFormat()),parent),
 	QGLWidget(QGLFormat(QGL::Rgba | QGL::DoubleBuffer| QGL::DepthBuffer), parent),
+#else
+	QGLWidget(QGLFormat(QGL::Rgba | QGL::DoubleBuffer| QGL::DepthBuffer), parent),
+#endif
 	m_cbs(cbs),
 	m_state_modifier(0),
 	allow_rotation(true)
@@ -186,6 +193,7 @@ glm::vec3& GLWidget::getObjPos()
 
 void GLWidget::initializeGL()
 {
+	std::cout << "GL VERSION = "<< glGetString(GL_VERSION)<< std::endl;
 	glEnable(GL_DEPTH_TEST);
 
 	if (m_cbs)
diff --git a/src/Utils/Shaders/shaderColorPerVertex.cpp b/src/Utils/Shaders/shaderColorPerVertex.cpp
index c2b6eb650d5bb3783ae26f5077d4e1e981953ea7..484ad150868234fadcb1312ed178cacf93156eb5 100644
--- a/src/Utils/Shaders/shaderColorPerVertex.cpp
+++ b/src/Utils/Shaders/shaderColorPerVertex.cpp
@@ -22,7 +22,6 @@
 *                                                                              *
 *******************************************************************************/
 
-#include <GL/glew.h>
 #include "Utils/Shaders/shaderColorPerVertex.h"
 
 
diff --git a/src/Utils/Shaders/shaderEnvMap.cpp b/src/Utils/Shaders/shaderEnvMap.cpp
index f30cb8f0a46a7494699d0f3dada64c70a37a5e8c..cd79e4011eaa6e059bf623e00e62def45180a34f 100644
--- a/src/Utils/Shaders/shaderEnvMap.cpp
+++ b/src/Utils/Shaders/shaderEnvMap.cpp
@@ -22,7 +22,6 @@
 *                                                                              *
 *******************************************************************************/
 
-#include <GL/glew.h>
 #include "Utils/Shaders/shaderEnvMap.h"
 #include <string.h>
 
diff --git a/src/Utils/Shaders/shaderExplodeVolumes.cpp b/src/Utils/Shaders/shaderExplodeVolumes.cpp
index b11ef3f96f28c803637e653c67abed8903a8b032..3fe01c2d326475ea4bf0372a60105addd1208a8c 100644
--- a/src/Utils/Shaders/shaderExplodeVolumes.cpp
+++ b/src/Utils/Shaders/shaderExplodeVolumes.cpp
@@ -23,7 +23,6 @@
 *******************************************************************************/
 
 #include <string.h>
-#include <GL/glew.h>
 #include "Utils/Shaders/shaderExplodeVolumes.h"
 
 namespace CGoGN
diff --git a/src/Utils/Shaders/shaderExplodeVolumesLines.cpp b/src/Utils/Shaders/shaderExplodeVolumesLines.cpp
index 36233a7468a461b94a7678d7ffa437d10b3a6fb4..94bc03a86e1fb45d088de1e0d2ff15640b3a6825 100644
--- a/src/Utils/Shaders/shaderExplodeVolumesLines.cpp
+++ b/src/Utils/Shaders/shaderExplodeVolumesLines.cpp
@@ -23,7 +23,6 @@
 *******************************************************************************/
 
 #include <string.h>
-#include <GL/glew.h>
 #include "Utils/Shaders/shaderExplodeVolumesLines.h"
 
 namespace CGoGN
diff --git a/src/Utils/Shaders/shaderFlat.cpp b/src/Utils/Shaders/shaderFlat.cpp
index fa1322b2565542ea76eab030fb0d872741eaea79..98060021f991dc509397b3babde1365958388333 100644
--- a/src/Utils/Shaders/shaderFlat.cpp
+++ b/src/Utils/Shaders/shaderFlat.cpp
@@ -23,7 +23,6 @@
 *******************************************************************************/
 
 #include <string.h>
-#include <GL/glew.h>
 #include "Utils/Shaders/shaderFlat.h"
 
 namespace CGoGN
diff --git a/src/Utils/Shaders/shaderFlatColor.cpp b/src/Utils/Shaders/shaderFlatColor.cpp
index 069e2277255a21b5af50fac610a1f7a3788ba543..b5de4900edfc71d399ad776b097fd60c09f9d980 100644
--- a/src/Utils/Shaders/shaderFlatColor.cpp
+++ b/src/Utils/Shaders/shaderFlatColor.cpp
@@ -23,7 +23,6 @@
 *******************************************************************************/
 
 #include <string>
-#include <GL/glew.h>
 #include "Utils/Shaders/shaderFlatColor.h"
 
 namespace CGoGN
diff --git a/src/Utils/Shaders/shaderIsoLines.cpp b/src/Utils/Shaders/shaderIsoLines.cpp
index 644552492504a2b650ab014501333a05515cd87b..57e85da1a32b2c9e8bd06558524bfeb85d58cc89 100644
--- a/src/Utils/Shaders/shaderIsoLines.cpp
+++ b/src/Utils/Shaders/shaderIsoLines.cpp
@@ -23,7 +23,6 @@
 *******************************************************************************/
 
 #include <string>
-#include <GL/glew.h>
 #include "Utils/Shaders/shaderIsoLines.h"
 
 namespace CGoGN
diff --git a/src/Utils/Shaders/shaderScalarField.cpp b/src/Utils/Shaders/shaderScalarField.cpp
index f651b1413b24fdc3d216ec2e9fdba314b330b487..a10be20bd7da664a9838ba915d5790e8e12ac5ed 100644
--- a/src/Utils/Shaders/shaderScalarField.cpp
+++ b/src/Utils/Shaders/shaderScalarField.cpp
@@ -22,10 +22,8 @@
 *                                                                              *
 *******************************************************************************/
 
-#include <GL/glew.h>
 #include "Utils/Shaders/shaderScalarField.h"
 
-
 namespace CGoGN
 {
 
diff --git a/src/Utils/Shaders/shaderSimpleColor.cpp b/src/Utils/Shaders/shaderSimpleColor.cpp
index 1b3b30bd89dea9563977634668572e04eec82880..1529a1851740f7404049a422f06e47c13cd3fbf0 100644
--- a/src/Utils/Shaders/shaderSimpleColor.cpp
+++ b/src/Utils/Shaders/shaderSimpleColor.cpp
@@ -22,7 +22,6 @@
 *                                                                              *
 *******************************************************************************/
 
-#include <GL/glew.h>
 #include "Utils/Shaders/shaderSimpleColor.h"
 
 namespace CGoGN
diff --git a/src/Utils/Shaders/shaderSimpleTexture.cpp b/src/Utils/Shaders/shaderSimpleTexture.cpp
index 84aa32390a89ca0574a875802e2b8468593d617c..cd89de644efba5b83c0aa4e1e996fef34c15c0c1 100644
--- a/src/Utils/Shaders/shaderSimpleTexture.cpp
+++ b/src/Utils/Shaders/shaderSimpleTexture.cpp
@@ -24,7 +24,6 @@
 
 #ifdef WITH_QT
 
-#include <GL/glew.h>
 #include "Utils/Shaders/shaderSimpleTexture.h"
 
 
diff --git a/src/Utils/Shaders/shaderTextureMask.cpp b/src/Utils/Shaders/shaderTextureMask.cpp
index 23053d0245c50f2d2994f5a7f8348c2f9de9005b..9051ffcb34cdf01b2825b5a1d6990155e39c4a3a 100644
--- a/src/Utils/Shaders/shaderTextureMask.cpp
+++ b/src/Utils/Shaders/shaderTextureMask.cpp
@@ -23,7 +23,6 @@
 *******************************************************************************/
 #ifdef WITH_QT
 
-#include <GL/glew.h>
 #include "Utils/Shaders/shaderTextureMask.h"
 
 
diff --git a/src/Utils/Shaders/shaderVectorPerVertex.cpp b/src/Utils/Shaders/shaderVectorPerVertex.cpp
index 55ef7e932291a2345a2d578427487544d205fd0d..9fac4ff84ba2ef959e220045f987d7aacce87189 100644
--- a/src/Utils/Shaders/shaderVectorPerVertex.cpp
+++ b/src/Utils/Shaders/shaderVectorPerVertex.cpp
@@ -22,7 +22,6 @@
 *                                                                              *
 *******************************************************************************/
 
-#include <GL/glew.h>
 #include "Utils/Shaders/shaderVectorPerVertex.h"
 
 namespace CGoGN