I’ve tried four times to use OpenCore Legacy Patcher 1.5 to install Mac OS Monterey 12.7.5 on an old 4GB 8,1 iMac 24” running the latest version of El Capitan. It fails every time at about 13 minutes into the final installation of Mac OS Monterey. El Capitan runs without problems. I have previously used OCLP to successfully to install versions of macOS on unsupported Macs many times, but none as old as an 8,1 iMac.
I don’t think I’m doing anything wrong, I’ve followed the instructions exactly, I’ve used different USB drives just in case there was an issue with the USB drive, and I’ve tried different formatting of the internal Mac hard drive too. A couple of times with Mac OS Extended Journaled and once or twice with APFS, but the result is always the same.
Everything seems to go normally and it begins the installation by giving me a time remaining starting around 41 minutes, jumping to 23 and then progressing more or less normally down to 13 minutes. At 13 minutes it hangs for probably five minutes maybe more and then it finally goes to 20 minutes, 16 minutes, 15 minutes, 14 minutes, 13 minutes, 11 minutes and then after a few seconds it reboots the Mac and begins the installation of Mac OS Monterey again. So I can’t figure out what’s wrong, I have double checked everything, I have reset the PRAM and nothing seems to help. All suggestions appreciated.
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