- #How to turn on macbook pro after battery dies mac#
- #How to turn on macbook pro after battery dies windows#
I have phoned Apple customer support and they have said this is obviously not normal behaviour, the onboard CMOS battery should be retaining the date/time for several weeks if the main battery is complete drained and the CMOS battery should recharge itself whenever the MacBook Air is connected to a power supply. I might run little snitch and see if I can see how often it’s pinging the server. I’m not sure how often OS X polls the NNTP servers for the time but I’m sure if I left it alone with the wrong date/time it would probably self-correct within half an hour or so of being connected to a network. Updates the internal clock with the correct details (as long as you are connected to a network).
#How to turn on macbook pro after battery dies windows#
Other than the annoying warning message it isn’t really too much of an problem for me though, I have had a few problems in the past joining my Windows domain at work as the domain server was reporting the MacBook Air had an illegal time stamp and a few outgoing emails have somehow been stamped with the wrong date/time although I thought they should have been stamped with my ISP’s SMTP server date/time?Īnd then unticking and reticking the set date and time automatically check box It would appear that my MacBook Air ‘s CMOS battery is defective and as such when the main battery is completely drained the onboard clock has no backup power source and loses the date and time. It normally shows midnight but it had been on charge for about 5 hours hence it’s showing 5:13am.Īlmost all computers, both desktop and portables, have a small secondary battery on the motherboard (CMOS battery) which is used to keep the computer’s internal clock ticking when disconnected from the mains power supply or a notebook battery runs completely flat.
#How to turn on macbook pro after battery dies mac#
For more information, choose Mac Help from the Help menu.Ĭlicking on the clock in the top right corner of the screen does indeed show that the date and time is set to January 1st 2001. Please use the Date & Time preference panel to set the clock manually. This may cause some applications to behave erratically. Your computer’s clock is set to a date before March 24th, 2001. Ever since I bought my MacBook Air nearly a year ago I’ve been plagued with a constant annoying problem, if I let the battery run completely flat, when I connect to a power source I get a warning saying my computers date is set earlier that March 24th 2001.