OSX Sierra 10.12.6
I have time sync (NTP, Automatic time) enabled on my MacBook Pro Sierra 10.12.6.
I was wondering how often does NTP sync and how to influence that (more often).
Thanks,
Ton.
MacBook Pro with Retina display, macOS Sierra (10.12.1)
I don't think you can change how often this runs, but you can manually run the ntpdate command in the Terminal or from a script, that you can schedule.
I have just tried running this on the command line:
sudo ntpdate -u time.apple.com
My clock was adjusted by six one-thousandths of a second, according to the output message I got:
23 Jul 16:19:00 ntpdate[1297]: adjust time server 17.253.34.253 offset -0.006098 sec
Of course, I have no idea when the date was adjusted last. A grep search in the system log showed no matches for "ntp" or "time server".
I don't know if there is a setting hidden somewhere that will allow you to change this, but why do you feel you want this done more often? Do you have any reason to believe that the clock in your mac is wandering off?
I have an application that requires exact time sync between my PC and the people i interact with. If the Mac syncs once every day, it might be, depending on the crystals used in the Mac, that the time may be off a few tenth of a second. That's too much for my application. So i would like to be in control on how many times i want to sync.
Guess what? ntpdate[23851]: step time server 17.253.34.253 offset -5.091927 sec
FWIW…
23 Jul 13:29:48 ntpdate[20357]: adjust time server 17.253.14.253 offset -0.017666 sec
How many times does Sierra time sync?
