I'm running Mavericks with everything updated and the clock on my work Mac is consistently 4 minutes fast. Google and http://www.timeanddate.com/ and my mobile phone are all the same "correct" time which is 4 minutes behind the Mac. My home Mac is always exactly correct. So I tried to fix the work Mac by restarting a few times while I tuned off & on "set date and time automatically". I manually entered the correct time and restarted. I tried re-enabling auto sync but all the time it insists on being exactly 4 minutes fast. Anyone else seeing this? Any suggestions?