Per About the security content of Mac EFI Security Update 2015-001 - Apple Support
I can't install b/c it complains that I'm on 10.10.4 so it exits w/o proceeding.
So how then do I install the EFI/SMC firmware update?
MacBook Pro with Retina display, OS X Yosemite (10.10)
How come it is not required to run the latest firmware on a more recent OS?
For example if the firmware installed is Boot ROM Version: MM61.010B.B00 and it yet Mac still does not allow for any way of updating, even if the current one is MM61.0106.B0A (2015-002)?
Also, what I stumbled upon: https://duo.com/blog/the-apple-of-your-efi-mac-firmware-security-research
I will be thankful for any help.
It's only availble for use in 10.8.5 or 10.9.5. You don't require it if your are running Yosemite.
EFI firmware update won't install (HT201518) on Yosemite
