How To Run C Program On Mac

Run C Program on Mac

Create a program first in a file.

#include <stdio.h>

int main(void)    
{
  printf("Hello, world!\n");
  return 0;
}

save your program as program.c.

Now we will need a compiler, go to App Store and install Xcode which is Apple's compiler and development tools. 

To find App Store? Search in "Spotlight Search" by typing ⌘Space and start typing App Store and hit Enter when it guesses correctly.

Xcode looks like this on App Store:

Then you need to install the command-line tools in Terminal. To open terminal type "terminal" in "Spotlight Search" 

xcode-select --install

Now compile the code by  running gcc as in the next line:

gcc -Wall -o program program.c

Note: On newer versions of OS X, you would use clang instead of gcc, like this:

clang program.c -o program

Then you can run it with:

./program
Hello, world!

---

If your program is C++, you'll probably want to use one of these commands:

clang++ -o program program.cpp
g++ -std=c++11 -o program program.cpp
g++-7 -std=c++11 -o program program.cpp