Why does my Mac shut down randomly?

Alex June 16, 2011
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Whenever I am playing a game on my MacBook Pro, it will shutdown if the power cable is not connected. It used to do it at around 60%, but now does it at as high as 93%. I have an appointment with Apple on Saturday, but I was wanting to get an answer sooner.

  1. Mjboc
    April 12, 2012 at 5:52 pm

    I have a brand new battery and the problem persists. I will try Apple's suggestion below.

  2. Tina
    June 18, 2011 at 11:00 pm


    did any of the tips above help you solve the issue? Please let us know in case you found a solution or whether you need more help. Thank you!

  3. Joseph Gorman
    June 18, 2011 at 2:44 am

    You can also try recalibrating your battery before shelling out for a new battery. Per Apple's website,

    1) Plug in your laptop and charge it until the MagSafe LED turns green and the menu bar meter says 100%.
    2) Leave it plugged in for at least 2 hours (you can use it during this time)
    3) Disconnect it and use it until it automatically sleeps.
    4) Allow it to sleep for at least 5 hours.
    5) Plug it in and charge it to full.

    Source: http://support.apple.com/kb/HT1490

    If that doesn't work, it's time to replace it.

  4. Rodrigo
    June 17, 2011 at 12:25 am

    It seems your battery is getting old (or defective) and suffering from something similar to Memory effect, but not exactly, as i assume it's a lithium-ion battery. When this happens, they stop correctly reporting their actual power status, hence the effect you see. Just replace it with a new one and you're good to go.