macOS OpenGL hello world using GLFW

cyan window

What a beautiful cyan! I made this window on macOS using C, OpenGL and GLFW. Here’s the C:

// main.c
#include <GLFW/glfw3.h>
int main(void) {
  if (!glfwInit()) return -1;
  GLFWwindow* window = glfwCreateWindow(320, 240, "Hello World", NULL, NULL);
  if (!window) {
    return -1;
  glClearColor(0.0f, 1.0f, 1.0f, 1.0f);
  while (!glfwWindowShouldClose(window)) {
  return 0;

To compile it:

$ brew install glfw3
$ clang -lglfw -framework OpenGL main.c
$ ./a.out

GLFW is an abstraction over the different window systems of MacOS, Linux, Windows, etc. This C should also work on Windows or Linux, though the compilation steps may look different.

I just released Vidrio, a free app for macOS and Windows to make your screen-sharing awesomely holographic. Vidrio shows your webcam video on your screen, just like a mirror. Then you just share or record your screen with Zoom, QuickTime, or any other app. Vidrio makes your presentations effortlessly engaging, showing your gestures, gazes, and expressions. #1 on Product Hunt. Available for macOS and Windows.

With Vidrio

With generic competitor

More by Jim

Tagged . All content copyright James Fisher 2017. This post is not associated with my employer. Found an error? Edit this page.