import os
import sys

def check_os():
    """Checks the operating system and prints a message accordingly."""

    os_type = os.uname().sysname.lower()

    if os_type == "linux":
        print("Running on Linux")
    elif os_type == "darwin":
        print("Running on macOS")
    else:
        print(f"Unsupported OS family: {os_type}")
        return 1  # Indicate an error

    return 0 # Indicate success


if __name__ == "__main__":
    exit_code = check_os()
    sys.exit(exit_code)