Configuring NTP on the latest version of OSX is, in typical Apple fashion, almost deceptively easy. As in previous versions of OSX any Mac can serve as an Network Time Protocol server with the check of one button. Once this is done you’ll be able to act as a network clock for any computer on your local area network.
To get ntpd going, simply do the following.
First open your system preferences and head over to date & time
Now check the box
And notice that the NTP daemon starts up and listens on the correct port.
What could be easier? Now get out there and synchronize your stop watches!