OpenGl and GLEW on Mac?

Hello I am trying to install GLEW on my Mac operating system for my computer graphics course. The instructions to get C++ working with OpenGL are below. I am having trouble installing GLEW. That link below does not seem to exist. What are some ways to have my computer graphics code with C++ work on my Mac. I am also including the sample code that's in the textbook. As of now I am not able to run that C++ code I'm guessing because I have not downloaded GLEW or/and have not configured all the settings to work with that.

////////////////////////////////////////////////////         

// square.cpp

//

// Stripped down OpenGL program that draws a square.

//

// Sumanta Guha.

////////////////////////////////////////////////////

#include

#ifdef __APPLE__

#  include

#else

#  include

#endif

using namespace std;

// Drawing (display) routine.

void drawScene(void)

{

   // Clear screen to background color.

   glClear(GL_COLOR_BUFFER_BIT);

   // Set foreground (or drawing) color.

   glColor3f(0.0, 0.0, 0.0);

   // Draw a polygon with specified vertices.

   glBegin(GL_POLYGON);

      glVertex3f(20.0, 20.0, 0.0);

      glVertex3f(80.0, 20.0, 0.0);

      glVertex3f(80.0, 80.0, 0.0);

      glVertex3f(20.0, 80.0, 0.0);

   glEnd();

   // Flush created objects to the screen, i.e., force rendering.

   glFlush();

}

// Initialization routine.

void setup(void)

{

   // Set background (or clearing) color.

   glClearColor(1.0, 1.0, 1.0, 0.0);

}

// OpenGL window reshape routine.

void resize(int w, int h)

{

   // Set viewport size to be entire OpenGL window.

   glViewport(0, 0, (GLsizei)w, (GLsizei)h);

   // Set matrix mode to projection.

   glMatrixMode(GL_PROJECTION);

   // Clear current projection matrix to identity.

   glLoadIdentity();

   // Specify the orthographic (or perpendicular) projection,

   // i.e., define the viewing box.

   glOrtho(0.0, 100.0, 0.0, 100.0, -1.0, 1.0);

   // Set matrix mode to modelview.

   glMatrixMode(GL_MODELVIEW);

   // Clear current modelview matrix to identity.

   glLoadIdentity();

}

// Keyboard input processing routine.

void keyInput(unsigned char key, int x, int y)

{

   switch(key)

   {

            // Press escape to exit.

      case 27:

         exit(0);

         break;

      default:

         break;

   }

}

// Main routine: defines window properties, creates window,

// registers callback routines and begins processing.

int main(int argc, char **argv)

{ 

   // Initialize GLUT.

   glutInit(&argc, argv);

   // Set display mode as single-buffered and RGB color.

   glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);

  

   // Set OpenGL window size.

   glutInitWindowSize(500, 500);

   // Set position of OpenGL window upper-left corner.

   glutInitWindowPosition(100, 100);

  

   // Create OpenGL window with title.

   glutCreateWindow("square.cpp");

  

   // Initialize.

   setup();

  

   // Register display routine.

   glutDisplayFunc(drawScene);

  

   // Register reshape routine.

   glutReshapeFunc(resize); 

   // Register keyboard routine.

   glutKeyboardFunc(keyInput);

  

   // Begin processing.

   glutMainLoop();

   return 0; 

}

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