I was wanting to reveal the EFI password on my Mac using this in the Terminal:
sudo nvram security-password
but instead of outputting hex data, it gives me this:
nvram: Error getting variable - 'security': (iokit/common) data was not found
I know there is a FW password because I get the lock when holding
Option on boot. Any ideas why this isn't working? I have admin access.
Macbook Pro 13-Inch w/ Retina Display, Mid-2014, running 10.10.4