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highSierra install failed

I tried to install highSierra, and it failed with the error I see others have with it being unable to “verify firmware”.

I have a mid-2012 13-inch MacBook Pro (MacbookPro9,2).

I currently have firmware MBP91.00D3.B0E, which I believe was updated with Sierra 10.12.2.

I notice that there is a firmware MBP91.00D3.B15 that is supposed to have been bundled with Sierra 10.12.4.

Is it possible that this firmware was overlooked when I upgraded, and could that be the reason for the failure to upgrade to highSierra? I have noticed that others that have the MacBookPro9,2 do indeed have that later firmware installed.

Is there anything that I can do to update my firmware to the later version, or is it possible that it was skipped for a valid reason?

Thank you for your time and effort in this problem!

~Ped

Apple security updates - Apple Support

welafever

That is an interesting list. But it does not seem to have any stand-alone Firmware upgrades on it.

What did you mean to suggest about that list?

It has the list of all the updates so I posted it so the poster could see if they missed one.

I don't think that applies in the case of Install, and this is why:

If you install from Recovery, or from a USB-stick, NONE of the items in the currently Installed MacOS are used or even referenced to allow or preclude the new Install. I doubt that 'what is already installed' has any bearing on whether the new Install would fail or work.

In addition, Mac OS Install has always been performed in an interesting way:

First the minimal NEW version of incoming MacOS is placed on the new Boot Drive. Then it does do a Restart, and you are running minimal new MacOS (or it crashes horribly).  Then the minimal incoming version of MacOS is used to perform the Full Install.

This very cleverly sidesteps all the issues of using OLD Mac OS to install new MacOS. You are always using the new, incoming version. If it fails, it fails very early, before your old MacOS has been overwritten.

pedetentous-

if there is firmware included, there may also be special instructions for a ceremony to Install that firmware. Past firmware upgrades have required that you hold the power button until a special "Update" sound is issued from the speaker, then release** 

** NB> this was the way it was done in the past -- DO NOT rely on this as the way it is done today!!

Check carefully that you have not omitted this special ceremony that allowed the firmware update to proceed. You may have to start the update again, your Mac may shut down, you perform the special ceremony, then proceed.

To clarify my first post:

Current Boot ROM — > MBP91.00D3.B0E

Boot ROM in question —> MBP91.00D3.B15

When I mentioned the EFI firmware update, I was wondering if that portion of the update was somehow skipped. I found this link:

https://github.com/gdbinit/firmware_vault/tree/master/EFI/MacBookPro

This list shows that there was a EFI firmware update for MBP91.00D3.B0E to MBP91.00D3.B15 in Sierra 10.12.4. I know that many of these firmware updates are done during a system update. I know that my recovery drive was still 10.12.2, and I am wondering if I somehow missed a firmware update, say if I perhaps hadn’t updated until directly into 10.12.5. Is something like that possible?

Regardless, I am still unable to install High Sierra, and I’m trying to figure out the root of the problem. I know in the install log is says “Boot ROM does not support APFS” at some point before it fails. This led me to believe that it is an issue with the EFI firmware.

I’m also looking into the possibility that it is the SSD (Samsung 850 EVO 1TB), but while in the installer for highSierra, I am indeed able to format the drive to APFS. It then proceeds to copy files to it, but then when it reboots it can’t find the drive.

Yes, I do understand that is how it works. Which leads me to believe that the boot ROM (what I was refering to as the firmware) is somehow the problem. It seems as if macOS does these types of updates under the hood as you update each iteration. This link leads me to believe that there is a newer boot ROM (MBP91.00D3.B0E) that my system does not have, and I am wondering if that is the cause of the problem. I am tring to figure out if I can update just the boot ROM and that this might fix the issue with highSierra’s installation. It looks as if the newer boot ROM was bundled with 10.12.4, and I am wondering if I somehow missed or messed up the firmware install at some point in the past.

firmware_vault/EFI/MacBookPro at master · gdbinit/firmware_vault · GitHub

if you installed 10.12.2 previously, a re-install of Sierra should bring in 10.12.6 today. If your theory is correct, it should come in with its firmware update as well.

最後更新：2017-09-30 09:43:48

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