This article looks at some of the common problems that result from SMC or PRAM/NVRAM malfunctions, as well as how to reset them to solve those problems. That’s true not only because it can make using your Mac much more difficult, or even impossible, but because the issues it puts out are so random it can make you feel like you’re being haunted! When any of these things go wrong, it can be hugely frustrating. Controlling backlighting and detecting ambient light to set appropriate levels.Adjusting fan speed to control the temperature of a Mac.Managing battery performance and displaying remaining battery life.Analyzing a power button being pressed to determine if it should respond by putting the Mac to sleep or shutting it down completely.Detecting (and responding to) the opening/closing of a laptop lid.Like an air traffic controller or a train controller, the SMC is responsible for controlling a number of Mac’s functions:
SMC stands for System Management Controller, the full name of which offers up a nice analogy for non-technical folks looking to understand what an SMC does.
