Merge pull request #520 from xlz/macosx-opengl32

opengl: Lower version to 3.2 for older Mac OSX

Author: floe

Diff for: src/opengl_depth_packet_processor.cpp

@@ -863,7 +863,7 @@ OpenGLDepthPacketProcessor::OpenGLDepthPacketProcessor(void *parent_opengl_conte
   glfwDefaultWindowHints();
   glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 #ifdef __APPLE__
-  glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+  glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
   glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
   glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 #else