potatohead

many thanks for your swift reply. i have included the patch according to this - https://github.com/non-vanilla-way/OpenCore-Post-Install/blob/master/extra-files/usb-rename.plist USBInjectAll.kext is also used. Still the same error. Attached is my config.plist file, which is actually ru379's OC070v2 + EH01 & EH02 USb patch as recommended above. config.zip

Many thanks to ru379 for sharing your resources. I have very similar hardware to yours, your board is GA-P55M-UD2, mine GA-H55M-UD2H; I too am using a GT710. I downloaded your EFI from https://github.com/ru379/BigSur-Monterey-on-Clarkdale/releases I used your OC 0.7.0v2 EFI on exactly the same macOS 12 Beta 1 installer, using Legacy Boot as this board does not have UEFI (I believe P55M-UD2 is also the same). I thought even if the boards are not exactly the same, I should be able to get to the install page or even install with errors and then I can troubleshoot. But no matter what I do, the usb installer will stop at asking me to turn on my mouse or trackpad. I discovered the keyboard does not work too in OC Menu Picker. I have changed mouse and keyboard and also the ports they are being plugged into. The USB installer boots ok from any of the USB ports. In short, the usb boots fine but i can't go any further because the mouse and keyboard don't work, I've tried many drivers and kexts: VoodooPS2Controller XHCI-unsupported.kext USBInjectAll CtlnaAHCIPort.kext I also followed OC's official guide and tried with and without UsbKbDxe.efi UsbMouseDxe.efi I made sure every time I change a kext or driver i update the config.plist file accordingly. But nothing worked. In BIOS, serial port and USB Legacy both have been disabled. I then created a the latest macOS 12 beta 9 installer using your 0.7.2 EFI, the exact same problem persisted. Any help would be appreciated, I have been trying for days unfortunately.