Resetting the PRAM and SMC on a MacBook

17/07/16 07:05
Resetting the PRAM (Parameter RAM) is generally the initial triage of any issue on a Mac. The PRAM is mostly the core essentials for getting your mac to start, and then operate.
Here’s how to reset your PRAM:
  • 1.Shut down your machine. Once the machine is completely shut down, press the power button and then press command-alt-p-r. You have to make sure you get those keys pressed before the grey screen comes up or it won’t work.
  • 2.Hold those keys down until your Mac reboots again and you here the startup chime.
  • 3.Let go of the keys and let your Mac reboot normally.
When you log back in, you may have to adjust your mouse speed, time and date/timezone, and a few other things, but otherwise you should be good to go.

Resetting the SMC
The System Management Controller stores/manages/controls a lot more interesting things than the PRAM:
Fans
Lights (including keyboard backlight)
Power
System Performance
If you have a MacBook/MacBook Pro that you can remove the battery from, here is what you do:
  • 1.Shut down the computer
  • 2.Disconnect the MagSafe plug from the machine
  • 3.Remove the battery
  • 4.Press the power button for 5 seconds and release
  • 5.Put the battery back in and reconnect the MagSafe cord
  • 6.Turn your machine back on with the power button

For MacBook Pros, MacBook Airs, and MacBooks where you can’t remove the battery on your own, here’s what you do:
  • 1.Turn off your machine Keep the MagSafe adapter plugged in.
  • 2.Press at the same time shift-alt-control (on the left side of the machine) and the power button.
  • 3.Turn your machine back on with the power button.


Post for MacBook & MacBook Pro Users