Problem with Efi drive in model13,2

[mansourrh]

My imac's model is 13,2 .Imac27inch 2012. and i got error cant load efi drive .... and cant inistall any macos.dmg from boot ,, and hardware test cant load too please check your file for this model is thinks is empty or corrupted please help me

Dear friend

You have to find the appropriate cd to restore your firrmware. Have a look at the process:

https://www.lifewire.com/mac-firmware-restoration-2259978

It is a very simple process , but I can not help you because the iMac 13,2 I don't know if exists on the available versions 1.4-1.9.

Usually Linux installations (UBUNTU) destroy the EFI in most Mac's. If you don't solve the problem, try visiting Apple Authorised Service , they have the tools to restore it. Unfortunately for money.

Good Luck

[mansourrh]

Thankyou For answering me but there isnt about my hardware model ,, my mac is 2012

…

On Sun, Sep 27, 2020 at 12:10 AM coa00kt ***@***.***> wrote: Dear friend You have to find the appropriate cd to restore your firrmware. Have a look at the process: https://www.lifewire.com/mac-firmware-restoration-2259978 It is a very simple process , but I can not help you because the iMac 13,2 I don't know if exists on the available versions 1.4-1.9. Usually Linux installations (UBUNTU) destroy the EFI in most Mac's. If you don't solve the problem, try visiting Apple Authorised Service , they have the tools to restore it. Unfortunately for money. Good Luck — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#41 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AREDJXIVOOBS4KGK7ML7STLSHZGUBANCNFSM4R2XQOPA> .

[cmigliorini]

Hi @mansourrh, I have the exact same issue (same hardware, same problem). I verified that firmware is ok

/usr/libexec/firmwarecheckers/eficheck/eficheck --integrity-check

gives

EFI Version: IM131.88Z.F000.B00.2006101655  (Boot ROM Version: 292.0.0.0.0)
Primary allowlist version match found. No changes detected in primary hashes.
SEC Version: IM131.AAPLEFI4.88Z.0014.I00.1209241135
SEC allowlist version match found. No changes detected in SEC hashes.

Now, I was wondering whether the blessing worked? When booting with 'option' key held, my USB stick shows as "EFI Boot" rather than "AHT".

[cmigliorini]

on the other hand, my iMac being a 13,2, why should EFI version be IM31*?

[mansourrh]

Hi sorry i didnt see this email until now, Now what happen? Do you solve this problem?

…

On Sat, Nov 28, 2020 at 9:35 PM Mig ***@***.***> wrote: on the other hand, my iMac being a 13,2, why should EFI version be IM31*? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#41 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AREDJXOE5MGP424OTOS75X3SSE3XXANCNFSM4R2XQOPA> .

[fabioganga]

Having the exact same hardware, same problem.

My only difference is the EFI seems to be newer than user @cmigliorini

/usr/libexec/firmwarecheckers/eficheck/eficheck --integrity-check
EFI Version: IM131.88Z.F000.B00.2012171805 (Boot ROM Version: 421.0.0.0.0)
Primary allowlist version match found. No changes detected in primary hashes.
SEC Version: IM131.AAPLEFI4.88Z.0014.I00.1209241135
SEC allowlist version match found. No changes detected in SEC hashes.

I appreciate any help to resolve this and finally be able to launch Diagnostics. Thanks

[cmigliorini]

Hi, I did not manage to solve this yet. Sort of gave up but am still interested should someone be able to help me fix this.