MacBook EFI Firmware Update 1.4
This update eliminates the noise made by the optical disk drive during wake from sleep on MacBook computers. When installation is complete, please run Software Update again, and install SuperDrive Firmware Update 3.0
To complete the firmware update process, please follow the instructions in the updater application (/Applications/Utilities/MacBook EFI Firmware Update.app). The updater will launch automatically when the installation is complete.
For more information about EFI Firmware, please visit the following: http://support.apple.com/kb/HT3706
For additional information, please visit: OS X Mountain Lion: Firmware updates may keep reappearing in the Mac App Store.
Boot ROM or SMC Version Information:
MacBook5,1 will update to MB51.007D.003
MacBook5,2 will update to MB52.0088.005