title: OpenGL version on mac
body: <p>I am compiling a source code on my mac with nanogui. The defaut opengl version is 330 but when I out put the gl version, it tells me,its 2.1 and the glsl version is 120. I manually set the following right after glwfint()</p>
  
  <pre><code>glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
  glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
  glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
  glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
  </code></pre>
  
  <p>But it still outputs gl version 2.1 and glsl version 1.2. and continue to tell me the GLSL language version is not supported. Is there any possibility that some other part of the code might change this setting so that the OpenGL sticks on its original mac version.</p>