Apple has released the SMC and EFI firmware updates for the MacBook Pros (late 2008 only) and Mac Book Airs. The updates are only for the new Late 2008 MacBooks – not for all MacBooks. If you need the updates, they will show up in Software Update.
SMC – System Management Controller for Intel- based computers. It controls the power functions on your logic-board.
EFI – Extensible Firmware Interface consists of an on-board flash EEPROM that includes the
hardware-specific code and tables needed to start up the computer, load
an operating system, and provide common hardware access services.
