It's the latter, "set date and time automatically". Turn that off, assuming you're getting messages in your mac console are similar to:
11:27:54.220 PM com.apple.time[141]: Interval maximum value is 946100000 seconds (specified value: 9223372036854775807).
When this happens in game:
2013-09-08 23:27:54 YOU HAVE BEEN DISCONNECTED.
Why does this happen? I haven't a clue
[You must be logged in to view images. Log in or Register.]