How to reset the SMC, PRAM and NVRAM on a Mac Laptop

ID: 113252

Description: Mac Laptop not booting up properly? Strange...

Steps:

  1. If your Mac has a removable battery, skip this step and go to step 2.
  2. Choose Apple menu > Shut Down.
  3. After your Mac shuts down, press Shift-Control-Option on the left side of the built-in keyboard, then press the power button at the same time. Hold these keys and the power button for 10 seconds. If you have a MacBook Pro with Touch ID, the Touch ID button is also the power button.
  4. Release all keys. Press the power button again to turn on your Mac.
    5. Step image
  5. Power down your Mac.
  6. Remove the battery.
  7. If you are unsure how to remove your Mac's battery, head on over to this linkand select your Mac's make and model.
  8. Once you have removed the battery, press and hold the power button for 5 seconds.
  9. Release the power button. Reinstall the battery.
  10. Press the power button again as you would to turn on the Mac.
    11. Step image
  11. Shut down the computer
  12. Press the Power button
  13. Before the grey color screen is shown, press and hold Command + Option + P + R keys simultaneously.
  14. Hold down these keys until the MacBook restarts and then you will hear the startup sound.
  15. Release the keys.
  16. Once you have reset PRAM/NVRAM, keep in mind that settings like disk caches, volume, time, keyboard and mouse preferences, will also be reset.
    17. Step image
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