I have an early 2015 13" MacBook Pro. Recently I followed u/mrmacintoshblog's very helpful YouTube tutorials on how to install Sonoma via OCLP. I'm a pretty big tech luddite, but after a few hours/attempts, I was finally able to pull it off. Feeling emboldened, I tried to take it a step further and follow the spoofing instructions on the OCPL website so that I could enable Universal Control. This is where everything went to hell...
Once I got to the reboot stage, I could not boot back up to save my life. I then tried booting into recovery and restoring from a Time Machine backup, but received an error that I needed to downgrade the OS first. Then I tried installing Monterey (both from my computer and the recovery thumbdrive u/mrmacintosh recommends making in his tutorial), but in both cases I received an error that I could not downgrade/install Monterey onto my Mac's internal drive.
For some reason, I thought to stick in my Sonoma thumbdrive with EFI image (I don't know what that even means) that I originally created back at the start of all this, and it worked! I was able to boot back into Sonoma, patch things up on OCLP, and can now boot up Sonoma straight from my Mac without connecting the thumb drive.
The Problem is that now I want to revert everything back to the way it was pre-OCLP/pre-Sonoma, but I don't seem to be able to do so. Can anyone offer any advice on how to restore my Mac to factory settings AND also downgrade from Sonoma to Monterey. Does anyone know what could be preventing me from installing Monterey back onto my hard drive?
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