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My Snow Leopard macbook is set to Set date and time automatically: Apple Americas/U.S. (, but despite sitting idle for several hours (with internet connection), it has yet to do any syncing, the date remains off by ~2 days.

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Try toggling it on and off to force a refresh. – mindless.panda Dec 20 '11 at 15:00
@mindless.panda - No joy. – Unsigned Dec 20 '11 at 15:52
How about trace routing and then trying a different ntp client against that server? – mindless.panda Dec 20 '11 at 15:59
up vote 15 down vote accepted

From terminal:

sudo ntpdate -u

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Seems to work fine in El Capitan too. – DuffJ Dec 14 '15 at 13:59

you can go into the system preferences and reset the time manualy, and then set the time to sync automaticly again once you are back up to speed with whatever day/week/month you need. i am not sure why its not syncing with apple, but you can just set the day properly and it will be accurate as long as you dont cross too many time zones.

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Many time sync utilities have safeguards, where they won't sync if the time difference is too large, to prevent disasters if, for example, time server is compromised, etc. So, set the time roughly right manually, then it should sync by itself. – haimg Dec 20 '11 at 16:05

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