![]() Controlling the built-in display backlighting.Controlling the status indicator lights.Choosing the external or internal video sources on iMacs with video input capabilities.Starting the hard drive spin-downs and power-up sequences.Controlling the trackpad functions for Mac models with trackpads.There are a few functions controlled by SMC or System Management Controller, including: It is also related to the behavior of your hard drive, the power supply, and how the Mac works in sleep mode. This one is usually able to be found in running a lot of the physical parts of the machine, such as keyboards, LED indicators, and the other peripherals, power buttons, and cooling fans. SMC or System Management Controller refers to a chip in Intel based Macs. Do you know what SMC or System Management Controller and PRAM are? Have you ever heard about these two? Do you know when and how to reset both of them? Keep reading to find out the description and the best instructions to reset them.
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