iMac Mid 2011 (12,1) – Stuck on black screen, can’t boot macOS or Linux

iMac Mid 2011 (12,1) – Stuck on black screen, can’t boot macOS or Linux

Welp, if I’m honest, I’m about to lose my mind because I have no idea what to do next. Let me give you some context.

I have a mid-2011 iMac (i5 / 12GB RAM / 250GB Samsung EVO SSD (Called "SSD") + 1TB stock HDD) running Ventura via OCLP without any problems — until one day it just wouldn’t turn on. It only shows an infinite black screen and never lets me log in.

So, I tried to reinstall Ventura. Nope — it just loads to a black screen, not even the utility menu. Then I tried macOS High Sierra (I have a bootable USB), but it can’t boot either. It’s like the EFI is broken or something. I even tried a Linux live USB (Elementary OS), but that won’t boot either.

I disassembled the iMac and manually formatted both drives (APFS on both) using my 2017 MBP, also with OCLP. Still nothing. I’ve tried installing High Sierra, OCLP Mojave, and Ventura, as well as booting with CMD+R, CMD+OPT+R, and CMD+OPT+SHIFT+R — and guess what? Nothing works.

I honestly don’t know what else to try. I’ve done everything I can think of, but I just can’t fix it. Any ideas?

BTW, the photo shows the message it displayed when I tried to boot Linux, in case it helps clarify the issue.

https://preview.redd.it/sizrk1a6tpwf1.png?width=1110&format=png&auto=webp&s=fa37c0b21910909d4ff57050d23d205e0dbf2fe7

submitted by /u/Lyooox
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