How To Reset SMC on a Mac

So your mac is having strange problems. You’ve tried it all and nothing works! You’ve reseted the NVRAM (which some people may refer to as PRAM), and you are still experiencing these issues. Well today we are going to look into how to reset SMC on a mac, which may or may not fix your problem.

SMC means System Management controller and it is responsible for controlling and managing system hardware for power consumption, battery charging and battery function, thermal activity and fan activity, LED lighting for keyboards and displays, GPU functionality with video mode changes and video output, sleep and wake, and other core hardware functionality on a Mac.

Basically the SMC is manages the following:

  • Responding to presses of the power button
  • Responding to the display lid opening and closing on Mac notebooks
  • Battery management
  • Thermal management
  • Sudden Motion Sensor (SMS)
  • Ambient light sensing
  • Keyboard backlighting
  • Status indicator light (SIL) management
  • Battery status indicator lights
  • Selecting an external (instead of internal) video source for some iMac displays

You may want to reset your SMC if you are having one of the following issues?

  1. Your fan runs constantly at high speeds or is not working at all.
  2. Your mac won’t turn on, won’t either go to sleep or wake up from sleep.
  3. Random shutdowns and reboots.
  4. Battery indicator lights won’t work or battery wouldn’t even charge.
  5. Display brightness functionality isn’t working
  6. And the list goes on!

Before you reset your SMC; try a NVRAM reset, also referred to as a PRAM reset. Here is our article on how to reset NVRAM on a mac.

Here is how you can effectively reset the SMC on your Mac:

If the battery is nonremovable:

  1. Choose Apple menu > Shut Down.
  2. 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.
  3. Release all keys.
  4. Press the power button again to turn on your Mac.

If the battery is removable:

  1. Shut down your Mac.
  2. Remove the battery. If you need help removing the battery, contact an Apple Authorized Service Provider or Apple Retail Store.
  3. Press and hold the power button for 5 seconds.
  4. Reinstall the battery.
  5. Press the power button again to turn on your Mac.

The following is a picture on what buttons you should be holding down to reset the SMC:

If for some reason, after resetting your computer’s SMC. You are still experiencing power issues. Leave us a comment and we will be happy to help you out! Thank you for reading.

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