You replace the generic EFI/OC folder with a custom one for your specific motherboard (B460, Z390, X99, etc.).
Big Sur 11.2 is more forgiving than 11.3, but it still has quirks. olarila big sur 112raw download link
Links for version 11.2 (build 20D64) are hosted in dedicated threads like Release: macOS Big Sur 11.2 . You replace the generic EFI/OC folder with a
Do not skip directly from 11.2 to 12 Monterey via System Preferences. You must update OpenCore and all Kexts first, or you will kernel panic. Do not skip directly from 11
: Always check the SHA1 hash provided in the forum post against your downloaded file to ensure it hasn't been corrupted.
The .img file format differs from the .dmg or .iso formats often used for macOS installation. You cannot simply copy the file to a USB drive; you must restore the image.