Mac Pro EFI Firmware Update 1.2
This EFI Firmware Update fixes several fan behavior and Boot Camp issues on Mac Pro computers.
After the firmware is successfully applied to your computer, your BootROM Version will be either:
MP11.005C.B08 or MP21.007F.B06
You can confirm the version of the Boot ROM installed on your computer using System Profiler.
To complete the firmware update process, please follow the instructions in the updater application (/Applications/Utilities/Mac Pro EFI Firmware Update.app). The updater will launch automatically when the Installer closes.
For more information about firmware updates for Intel-based Macs, please visit: About firmware updates for Intel-based Macs