import os

def execute_cmd(cmd:str) -> str:
    """
    Execute the command in the mac terminal.
    
    Parameters
    ----------
    cmd: str
        The command to be executed.
    
    Returns
    ----------
    output: str
        The output of the command.
    """
    # execute the command in the mac terminal.
    # Alert!! The execution should be really careful, because it can be dangerous.
    # It is recommended to use this in a sandbox environment.
    try:
        output = os.popen(cmd).read()
    except Exception as e:
        print("Error when executing command %s in terminal:" % cmd )
        print("Error is:", e)
        return False
    return output