Reset the SMC

The SMC controls many different low level functions on your intel-based Mac. If you start to notice your mac isn’t responsive to certain buttons presses or fans run at hight speeds or not at all. There is a full list of Mac ailments available on Apple’s support article. An SMC reset could be the fix!

  1. Shut Down your Mac
  2. Press the left Shift+Control+Option all at the same time on the built in keyboard and then press the power button. Continue to hold for 10 seconds.
  3. Release all keys.
  4. Power on your Mac normally

If you have a removable battery remove it after shutting down your Mac and replace it before turning your Mac back on.