title: GLSL version on my macbook is not the same as one would expect
body: <p>I have MacBook pro with Radeon HD6750, MacOS 10.7.5 and I found that it should support OpenGL 3.2 and GLSL 1.5 <a href="https://developer.apple.com/graphicsimaging/opengl/capabilities/GLInfo_1075_Core.html" rel="nofollow">proof</a>. Unfortunately, when I try to build one thirdparty application with shaders (OpenVDB viewer), it returns that my hardware doesn't support <code>#version 130</code>. The code is below: </p>
  
  <pre><code>mShader.setVertShader(
      "#version 130\n
      "in vec3 vertex;\n"
      "in vec3 color;\n"
      "out vec4 f_color;\n"
      "void main() {\n"
      "f_color = vec4(color, 1.0);\n"
      "gl_Position =  gl_ModelViewProjectionMatrix * vec4(vertex, 1.0);}\n");
  //check that it is shader and add source
  glCompileShader(mVertShader);
  
  char buffer[256];
  int l = 0;
  glGetShaderInfoLog(mVertShader, 256, &amp;l, buffer);
  if(GL_NO_ERROR != glGetError()) throw "Error: Unable to compile vertex shader.";
  </code></pre>
  
  <p>I installed OpenGL Extension viewer and it informs me that Shading language version is 1.20 and OpenGL version is 2.1 (fully supported, some features from 3.2 are available). 
  I don't want to use GLSL 1.2 if my hardware is able to support a newer version.
  Do you have an idea what's wrong with my drivers/hardware and how I can fix this problem?</p>