System Management Controller

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The System Management Controller (SMC) is a subsystem of Intel processor-based Macintosh computers. It is similar in function to the older SMU or PMU of non-Intel Macintosh computers.[1]


The SMC has roles in controlling thermal and power management, battery charging, video mode switching, sleep and wake, hibernation, and LED indicators. It also enables enforcement of the Mac OS X End User License, allowing it to identify when it is running on non-Apple hardware.[2]

See also[edit]


  1. ^ Apple general documentation on SMC Updates
  2. ^ "Interview with Andy Hall, Product Manager for Oracle VM VirtualBox". 

External links[edit]