Are you having any particular issue?

Hi , thanks for the reply and sorry . Still new to the opengl thing 

I already solve that issue . 

I have another question is there away to add GLES2 and EGL lib in to Xcode ?

cos I’m trying to follow a sample of code that my school gave but is for window platform so I’m trying to get it to work on mac platform . 
 

Here is a part of the code here I’m having issue currenly 

 glfwSetErrorCallback(error_callback);

  // Initialize GLFW library

  if (!glfwInit())

    return -1;

  glfwDefaultWindowHints();

  glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API);

  glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 2);

  glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);

  // Create and open a window

  window = glfwCreateWindow(WINDOW_WIDTH,

                            WINDOW_HEIGHT,

                            "Hello World",

                            NULL,

                            NULL);

  if (!window)

  {

    glfwTerminate();

    printf("glfwCreateWindow Error\n");

    exit(1);

  }

  glfwMakeContextCurrent(window);

  Init();

  // Repeat

  while (!glfwWindowShouldClose(window)) {

    Draw();

    glfwSwapBuffers(window);

    glfwPollEvents();

  }

  glfwDestroyWindow(window);

  glfwTerminate();

  exit(EXIT_SUCCESS);

}

The problem is that when I run the code it show the erro message “ glfwCreateWindow Error message ”

But if I comment out the line  glfwWindowHint(GLFW_CLIENT_API,GLFW_OPENGL_ES_API);

Then is program is able to run , is there away to over come it ?

Are you doing mobile dev?

no , not for this one . just opengl 

Why are you trying to load GLES then?