Monterey won't install on Mac 10.1 using Opencore Legacy Patcher 0.67

[Mike Ashlynn]

Hi

 

I have been tring to revive my Mid 2012 15" Retina Macbook Pro 10.1 and hoped that using Opencore Legacy Patcher would be fairly painless on an untouched Mac (currently on High Sierra)

I have followed the processes a number of times and have got to the stage where it asks to reboot, choose the EFI Partitiion and then the Install Monterey option.

 

At this point the screen shows to the Apple Logo, showing the loading progress bar.  It then changes (to a much higher) resolution, does the same and then boots into Recovery Mode and does not give me the option to to anything other than attempt a recovery on the currently installed High Sierra OS.

 

There are no other options available other than to Choose a User to attempt recovery or Restart.

 

I'm guessing it's probably something fairly simple (I've tried Ventura as well, in case it was something specific - but the same thing occurred)

 

Any pointers would be appreciated

 

 

 

[Middleman]

Have a look at the OCLP Troubleshooting page here. > Troubleshooting | OpenCore Legacy Patcher (dortania.github.io)

If you keep getting an infinite loop it may be the case that you need to reset the NVRAM using Command-Option-P-R at boot.

However you will need to uninstall Opencore first (according to the above guide).

[Mike Ashlynn]

Thank you.  I had already looked at the troubleshooting guide and had dismissed it as it was not actually an infinite loop.

However, I reset the NVRAM and tried again to boot from the USB.  This time I managed to get to a Language choice screen, before it went to the data recovery assistant and the same option to recover the existing working High Sierra installation.

 

But still no option to install Monterey unfortunately.

 

 

[Mike Ashlynn]

Ok - I've tried the exact same procedure with a Mid 2014 13inch Macbook Pro Retina using the exact same USB and it works perfectly.  It is currently running Big Sur and can update to Monterey & Ventura.

Any thoughts what could be different with my Mid 2012 and why it won't even get to the install screen ?

 

[Cyberdevs]

@Mike Ashlynn

try this guide:

https://macmeup.com/easily-use-oclp-to-install-macos-on-your-mac/

[Mike Ashlynn]

Thanks, for the link.   I've been through it again, but as I mentioned I can successfuly go through the install on a 2014 Macbook but the 2012 just will not get to the install screen.

Therefore I'm concluding that I understand the basic creation and install steps, but something is different between the two machines (other that age).

 

[Cyberdevs]

How did you create the EFI for your 2012 MacBookPro?

[Cyberdevs]

The reason I ask is because when I was trying to install macOS Monterey on my Late 2010 MacBookAir I created the EFI manually and no matter what I did, it didn't work, so I created the USB installer using OCLP instead and then it generated the EFI and even applied the root patches at last stage of installation and it saved me a lot of time and unnecessary headaches.

 

[Mike Ashlynn]

I used OCLP 0.67 for both.

[Mike Ashlynn]

Cyberdevs

 

I think I found the issue / solution.   I went though everything I could imagine might have been different between the two MacBooks and noticed that the 2012 had FileVault enabled.

After decrypting the disk I tried again and immediately the normal Install screen appeared.  Installing Monterey as we speak so hoping all goes well.

 

Thank you for your help and advice.

[Cyberdevs]

@Mike Ashlynn

I'm glad that you found the solution.

[deny putranto]

I have the same issue, I checked the filevault it already disable, so what should I do? Reset NVRAM didn't work for me. Please advice.