Ultimate Apple Repair Toolkit on Amazon Prime: https://amzn.to/3sBgVjk A System Management Controller (SMC) Rest can fix many Macbook and iMac problems as well as Mac Mini and Mac Pro. This video will show you exactly how to reset the SMC step by step as well as other hints and notes about the reset process. On Macbooks (Pros and Airs) plug in the MagSafe charger and wait until you see that the battery is charging (red or yellow light). Press and hold down CONTROL + OPTION + LEFT SHIFT + POWER BUTTON for 5 seconds, when you let go, observe the MagSafe light indicator color, it should turn green then a few seconds later back to orange or red. This will let you know that the SMC has been reset. On iMacs, Mac Pros, Mac Minis, disconnect the power cord then press and hold down the power button for 5 seconds. Plug the system back in and start normally, the SMC is now reset. The SMC is in change of a lot of information and is one of the most essential controller chips on the logic board. Parts and tools used in this video can be found at: https://store.gribsoft.com/ Our Website: https://www.gribsoft.com/ Support us here: https://www.gribsoft.com/support-us