About the SMC Firmware Updates
Summary
SMC Firmware Updates refer to the System Management Controller (SMC) firmware update for Intel-based computers. The SMC is a micro-controller on the logic board that controls the power functions for your computer. The SMC controls various functions, including:
- Power and thermal management, the Sleep LED, and battery.
- Controlling the fans, supporting Sudden Motion Sensor, Ambient Light Sensor (ALS), and the power switch.
Tip: Print or write down these instructions before you begin installing the update.
Note: Some USB and FireWire devices may prevent firmware updates from installing correctly; disconnect non-essential devices and use only an Apple keyboard and mouse to apply the update.
Determine if an update is available for your computer.
- Refer to EFI and SMC firmware updates for Intel-based Macs to determine if an update is available for your computer.