asrock-b550-phantom-gaming-itx-ax-opencore VS MountEFI

The EFI I used is this one since the build is basically identical, only difference being I have a Ryzen 5600 instead of 5600X. OpenCore version used is 0.7.9.

You need to manually copy the EFI folder from your pendrive to your system's EFI partition. Use MountEFI made by u/CorpNewt to mount your system's EFI partition.

Use MountEFI, and follow the instructions from this guide.

It's a red flag that GUID_partition_scheme is not displayed under Type on diskutil list for my Ventura install (but it's displayed in Disk Utility, I can see GUID Partition Map on Device Information => Scheme for Ventura partition). The EFI partition is also not displayed in my Ventura partition on diskutil list, which is weird, because I'm able to use Mount EFI on it.

Once I added the "BlueToolFixup.kext" in the EFI folder (using MountEFI: https://github.com/corpnewt/MountEFI), it was time to update from macOS Catalina to Monterey. The update process was successful, and after disabling SIP (as instructed by chris1111 -author of Wireless-USB-BigSur-Adapter-.), everything worked fine.

MountEFI

For booting without USB stick i just mounted the EFI partition of my boot drive and pasted there my entrire EFI folder from the USB. To mount the EFI partition i used MountEFI script. Link to MountEFI : https://github.com/corpnewt/MountEFI

If you currently have MacOS installed : https://github.com/corpnewt/MountEFI follow this

Or you can download mount efi script

Use tools like Mount EFI script or what you prefer.

You need to mount your EFI partition (find a tool online or use command line). In it you should find "EFI/OC/config.plist". Open the file with Propertree or another plist editor and make the changes.