How to reset the SMC of your Mac

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.