Reset the SMC of your Mac if you don't have a Mac with Apple silicon or the T2 chip

Reset the SMC of your Mac if you have a Mac with the Apple T2 chip 読む Reset the SMC of your Mac if you don't have a Mac with Apple silicon or the T2 chip 1 分 How do I know if a USB-C Adapter is compatible?

Follow these steps on older computers that have neither Apple silicon nor the Apple T2 Security Chip.

Laptop computer

  1. Shut down your Mac.

  2. On your built-in keyboard, press and hold all of these keys:

    • ShiftNo alt supplied for Image on the left side of your keyboard

    • ControlNo alt supplied for Image on the left side of your keyboard

    • Option (Alt)No alt supplied for Image on the left side of your keyboard

  3. While holding all three keys, press and hold the power button as well.

    Notebook keyboard with all 4 keys pressed
  4. Keep holding all four keys for 10 seconds.

  5. Release all keys, then press the power button to turn on your Mac.

 

If your Mac isn't a laptop computer, follow these steps:

  1. Shut down your Mac, then unplug the power cord.

  2. Wait 15 seconds, then plug the power cord back in.

  3. Wait 5 seconds, then press the power button to turn on your Mac.

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