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I reinstalled the system this computer came with using recovery, but when i tried checking the efi firmware using a terminal command it gave me a imac15 id., i used instructions from this site to check.
is there another way to check?
Maybe the replies here contain more thought then necessary, im asking how to check versions because Apple had clearly stated that their boot versions are not backward compatible with older no longer supported machines., in fact Mojave now requires afps formatted drives to install boot partitions, after almost a year of denying this was going on after catalina was released with no communication with alsoft Duskwarrior to help anyone sort failed installs of catalina or bricked machines Apple releases the list of compatible boot firmware, here is the link https://www.tardisk.com/pages/how-to-check-your-firmware-version
https://support.apple.com/kb/DL1848?locale=en_US
im just asking for ways to check if any besides the terminal instructions mentioned in the link, the firmware links go directly to Apple’s server, find the correct version (nit current) and even install it..however my results showed errors which means i will have to re install the system my computer shipped with using recovery, upgrade to mavericks according to this info then re install the correct versions…or face possible un mounting ssd drives, bricked etc.
the primary allow list version match is not found, apple officially removed it!
You would be better off asking your questions to the guy who runs the blog you linked to since he is the only person I'm aware of that has that much knowledge about the Apple firmware revisions and he even created some of the custom utilities. All Apple has included with macOS is a command line utility for verifying the firmware to see if the computer is running the latest version (or perhaps is just running a compatible firmware version for the OS that is currently booted). Even that Apple utility doesn't work correctly as far as I can tell when I tried it once (I don't recall the name now). I think the blogger you linked actually mentions the Apple utility in one of his blog posts.
Apple no longer provides any information about what firmware is available for any of their Macs. Apple stopped updating their own documentation listing the current latest version of firmware for each system several years ago. The blogger you linked has shown that even putting the firmware updaters within the macOS installers does not always keep a Mac's firmware up to date since some people are still running older firmware for unknown reasons even after running a macOS 10.13+ installer.
@Grant has provided you the only information we have available to us except for the content on the blogger's website you linked. You cannot downgrade the Mac's firmware and even if it were possible the moderator's would likely never permit any links or discussion about it.
menu > About this Mac > (system report) ...
Firmware is reported as Boot ROM version. For Intel Macs, SMC version is also shown, but changes to SMC firmware are rare.
To the best of our knowledge, firmware is ALWAYS [intended to be] backward compatible. Installing a different MacOS will NOT reset firmware to an older version -- the updated firmware version will remain in place.
But i can install the system it Came with which includes the original firmware etc
the question is how to check the firmware and of future installs, For example I use the mojave on a USB stick, but because it was creating an iMac it installed the imac’s efi firmware.
on another MacBook Pro same model same year the firmware installed from recovery remain the same even after installing Catalina, and I never had a problem since a year now
Actually re installing the system that the computer came with in recovery mode or with a back up does re install the EFI firmware, its recommended by all ssd m1 key manufactures., it would be forced obsolescence of Apple to modify a older Operating System available online if the original ones contained them.
My question is if there is another way to check both the computer EFI firmware as well as installer.
i shared a link in the first post which showed one example of checking by using a terminal command., but what about installers?
Mac firmware is intended to ALWAYS be backward compatible. If not, Apple modifies it until it is correctly backward-compatible in each and every case.
You are massively over-thinking this. No one fiddles with older firmware versions -- it is not necessary. The newer versions just work with the older MacOS software, all the way back to factory original versions.
Mac Installer does not back out a newer firmware version, even when an older one is included in the Installer packages. If the already-Installed version is newer, the firmware is left alone.
just found a helpful link to get the matching efi firmware
but still would like an answer as to how to check which efi versions come with installer etc
Once upgraded, the old firmware is NEVER re-installed automatically.
A factory version specific to different Model Mac should refuse to install on a different model.
Good point, ill ask him since I no one here knows or is allowed to say or should etc
thanks
can anyone advise the correct efi version for a early 2013 mbp a1398?
