I have a 15-inch MacBook Pro late 2011. System Information gives me the following firmware versions:
EFI Boot Rom Version: MBP81.0047.B2C
SMC Version (system): 1.69f3
Apple provides the following web site for downloading firmware upgrades: https://support.apple.com/en-us/HT201518
On this website the following downloads are available for my system:
EFI Boot ROM version: MBP81.0047.2AB (2015-001)
SMC version: 1.69f3 (SMC 1.5)
The SMC version is the same as the one installed on my system, so no need to update anything.
However, there is a discrepancy with regard to the EFI Boot ROM versions (installed MBP81.0047.B2C vs. MBP81.0047.2AB). How can I tell whether the …2AB version is a newer version than the …B2C version on my system? Will the upgrade programme check during the upgrade process? I
Best Answer
The updater program will check to see if you already have the latest version of the Firmware. Taken directly from the Apple web page that you linked to: