Just worked through the Hello Triangle OpenGL 4 tutorial from Anton Gerdelan (@capnramses). Its been hard to find good OpenGL 4 tutorials and books! I’m using these tutorials to supplement OpenGL SuperBible 6th ed.. It just assumes you already know too much and I like to work through complete examples and experiment. I also worked through the extra exercises at the end of the tutorial to create another fragment shader and second VAO.
It also helped me get GLEW and GLFW up and running in Xcode on my first Mac(!!).