Hello Jardon,
I have carefully read Your instructions to install Open Core. I'm still undecided ...
iMac 9,1; OS X 10.11.6. OpenCore installation on USB-stick with installer for Monterey completed. Start screen as described. I have 3 partitions on my internal drive: old OSX Tiger (one program still used), El Capitan with many useful programs not supported by higher OSXs and a new partition for Monterey.
After installing Monterey some post installation action are required.
Question: Can I stlll use my two old OSX systems by chosing them as start volume in the start screen (of course with option/alt key pressed) or do I always have to reset the post install root patches?
Many thanks for Your helpful instruction!
Kind regards
Andreas