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If the battery is non-removable
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Shut down your Mac.
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Unplug the MagSafe or USB-C power adapter from your computer.
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Using the built-in keyboard, press Shift-Control-Option on the left side of the keyboard, then press the power button at the same time. Hold these keys and the power button for 10 seconds.
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Release all keys.
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Reconnect the power adapter.
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Press the power button again to turn on your Mac.
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