Mac users interested in Upgrade pro efi firmware 1.1 generally download:
MacBook Pro EFI Firmware Update resolves an issue which can cause the system to hang during heavy processor loads.
Enhance and add support for new features in Mac Pro series starting from late 2013. The package improves reboot stability, fixes memory self-test errors, optimizes the Boot Camp graphics power management, etc. Updating is done automatically and requires a system restart.
