This page http://stackoverflow.com/questions/2350167/basic-skeleton-for-a-c-opengl-pro... contains a ~70 line C program to put up a window and draw a triangle using Open GL. It looks like a good starting point for someone like Dan who already knows Open GL and C. It compiles on my Mac with this command: cc oglexample.c -o oglexample -framework OpenGL -framework GLUT I was surprised to find it. It's as if the whole industry wants to steer people away from simple solutions, and yet the right question, "opengl headers mac", Google, and those Stack Overflow users, had one. --Steve