MacBook SMC and NVRAM Reset (2012-2019 models only)

*** Note: This is only for 2012-2019 MacBooks...NOT for 2020 MacBooks. ***

Resetting the SMC and NVRAM on a MacBook can help correct some hardware and network issues. It is recommended to perform an SMC reset first, and then perform the NVRAM reset.

SMC Reset (2012-2019 MacBooks only)

Reset the SMC on other computers

Notebook computers with a nonremovable battery

  1. Shut down your Mac.
  2. On your built-in keyboard, press and hold all of these keys:
    • Shift  on the left side of your keyboard
    • Control  on the left side of your keyboard
    • Option (Alt)  on the left side of your keyboard
  3. While holding all three keys, press and hold the power button as well.
  4. Keep holding all four keys for 10 seconds.
  5. Release all keys, then press the power button to turn on your Mac.
(go down to Reset the SMC on other computers): 

NVRAM Reset (2012-2019 MacBooks only)

How to reset NVRAM

Shut down your Mac, then turn it on and immediately press and hold these four keys together: Option, Command, P, and R. You can release the keys after about 20 seconds, during which your Mac might appear to restart.

  • On Mac computers that play a startup sound, you can release the keys after the second startup sound.
  • When your Mac finishes starting up, you might want to open System Preferences and adjust any settings that were reset, such as sound volume, display resolution, startup disk selection, or time zone.
  • Apple support page for NVRAM reset:
Creation date: 4/7/2021 11:03 AM (jgates)      Updated: 4/9/2021 11:59 AM (epinon)