Apple today released MacBook EFI Firmware Update 1.1 which improves the performance and reliability of Intel Core 2 Duo processors and fixes issues with Boot Camp for MacBook computers.
• Mac OS X 10.4.10 or later
• MacBook (Late 2006)
• MacBook (Mid 2007)
After the firmware is successfully applied to your computer, your BootROM Version will be: MB21.00A5.B07
You can confirm the version of the BootROM installed on your computer using System Profiler.
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 Installer closes.
MacBook EFI Firmware Update 1.1 is available via Software Update and also as a standalone installer.
More info and download link (1.7MB) here.
[Thanks to MacDailyNews Reader “GmanMac” for the heads up.]