MP 1,1-5,1 Need Help OpenCore

[Phazemonster]

Help Needed OpenCore Legacy Patch Installation No Boot Disk on Startup

Hi
I think I screwed up and made a mistake please help resolve the crashing problem while starting up after I may of installed the Legacy patcher on my main system Drive Mohave with th 6.7 Legacy Patcher please see the attached file

 

[nettmanek]

did you install it on a second drive? Or overwritten the currently installed OS. You should never overwrite the only working instance of your OS

Also what cMP is that, what GPU you have etc

How did you prepare usb drive?

 

[Phazemonster]

did you install it on a second drive? Or overwritten the currently installed OS

Well I didn’t get that far, what happened was I had previously installed OpenCore 9.3 and then I was attempting to install Ventura and I tried to install OCLP 6.7 to my system drive and it said something about aEFI and rebooting and when it rebooted that’s when I got the problem

 

[nettmanek]

Am I correct? You had Mojave standing on OC9.3 and you installed OCLP on top of it? Why

 

[Phazemonster]

Am I correct? You had Mojave standing on OC9.3 and you installed OCLP on top of it? Why

Yes and I’m new at this and I am learning about OP and OCLP. I watched a lot of videos about this and I think I made a mistake in installing OCLP 6.7 on top of 9.3 OC, a major boneheaded move and it’s terrible I know, so is there anything I can do about it now? I am attempting to create a boot drive with High Sierra currently because I am using a different Mac with Sierra OS and i unable to get a Mohave download link for the installer.

 

[nettmanek]

that’s a good plan, if you get high sierra back installed, you can install mojave or later system with OCLP but follow their instructions, install it on a separate drive using USB installer prepared by OCLP, as a good practice I also recommend you to make a copy of EFI partition on a USB pendrive just in case something happens, that can save you a lot of nerves and time

 

[macway]

Also need Help: MacPro 2012 . latest patcher macOS 10.15.7 Rom corruption ?

Had permissions issues with some imported files randomly going invisible, repaired permission from recovery then 24 Hours later boot stops at Handoff. disconnected all peripferals, removed all PCIe cards, same outcome regardless of boot drive. It is like if the ROM was corrupted. Any suggestion? Thank YOU
( I had explored all other avenues initially including reset SMC. ZAP Pram etc Single User mode FSCK--- does not work either)

So after a methodical process of elimination it turns out that the very last thing I would consider for such a symptom, the Video card , was the culprit. The Faulty card is an NVIDIA Quattro 5000K 6Gb, temporarilly replaced with a Radeon 2GB.Hope it helps someone. It seems that an issue with PC Video cards with firmware upgrade to Mac is that their Mac Firmware is lost or corrupted when you Zap the Pram of the CPU.