The System Management Controller (SMC) controls several core Mac functions. The SMC is hardware built into your Mac’s motherboard. Its purpose is to free your Mac’s processor from the need to perform rudimentary hardware functions. Since many core tasks are handled by the SMC, resetting the SMC to its default state can resolve issues.
How and Why You Need to Reset Your System Management Controller (SMC) on a MacBook
The list of features controlled by the SMC is long and varies depending on the Mac model.
The SMC performs the following functions:
Resetting the SMC isn't a miracle cure, but it can fix many symptoms that a Mac may experience, including:
