Firmware
What is the lastest firmware version of an MBP retina mid 2012?
MacBook Pro
What is the lastest firmware version of an MBP retina mid 2012?
MacBook Pro
Not sure exactly, but you could look here: https://support.apple.com/downloads/macnotebooks
Not sure exactly, but you could look here: https://support.apple.com/downloads/macnotebooks
Apple no longer posts the firmware revisions anymore. You can check this site for what firmware versions are provided by macOS (you may need to look at the older posts as well for some systems):
https://eclecticlight.co/2019/10/08/which-efi-firmware-should-your-mac-be-using-version-4/
Firmware