The search for "Opengl 3.3 Download Mac" is a common dead end. The good news: you already have it if your Mac runs macOS 10.9+ and has a GPU from 2012 onward. You just need to configure your development environment correctly.
Change to #include <OpenGL/gl.h> or use GLFW + GLEW which handle platform differences. Opengl 3.3 Download Mac
Before we dive into the download and installation process, let's discuss why you might need OpenGL 3.3 on your Mac. Here are a few scenarios: The search for "Opengl 3