From: Jason Ekstrand
-Mesa 17.0.0 implements the OpenGL 4.4 API, but the version reported by +Mesa 17.0.0 implements the OpenGL 4.5 API, but the version reported by glGetString(GL_VERSION) or glGetIntegerv(GL_MAJOR_VERSION) / glGetIntegerv(GL_MINOR_VERSION) depends on the particular driver being used. -Some drivers don't support all the features required in OpenGL 4.4. OpenGL -4.4 is only available if requested at context creation +Some drivers don't support all the features required in OpenGL 4.5. OpenGL +4.5 is only available if requested at context creation because compatibility contexts are not supported.