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I have a late 2008 MacBook Pro work computer. Here's the sequence of events:

  1. I fully charge the battery
  2. I unplug the Mac from the power cable
  3. The Mac immediately shuts down

Before unplugging the Mac, I press the battery power indicator button and all lights are green. When I unplug the Mac I press the indicator button again and only one light is green.

I've tried resetting the PRAM, SMC and even bought a new battery but the problem persists. Here is the System Information.

How can I get my MacBook Pro to stay powered on when not plugged in?

Update: It was a dead battery. Apple gave me a new one for free.

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3 Answers

up vote 3 down vote accepted

If you bought a new battery, and that didn't fix the issue then I would say it is a short in the logic board. If it is still under Apple Care, I'd take it into a store, or call 1(800)MY-APPLE to get it checked out, and serviced.

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It is possible the new battery is bad. There are a lot of crappy counterfeit Apple MBP batteries out there. If it a genuine Apple battery, take it in to your local Apple Store. –  Alex Reynolds Dec 25 '11 at 11:35
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Looks like your battery is dead. Your system report states that:

37. Condition: Service Battery

Time to either stay plugged to power, or get a new battery.

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He already got a new battery, that's the strange part. –  Bart Arondson Mar 8 at 16:16
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This is really anormal. Have Apple repair your Mac.

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-1. Not a helpful answer. –  Bart Arondson Mar 8 at 16:15
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