We'll need to install Clover to your hard disk. Without that, you won't be able to boot to macOS.
Download Clover Install Package.
Right-click and press Open.
Continue until you get to Installation Type.
Change Install Location...
Choose the hard disk you have your macOS installed and press
Customize and Choose these settings:
Clover for UEFI booting only
Install Clover in the ESP
- VBoxHFS (or HFSPlus)
Install RC Scripts on target volume (or Install RC Scripts on other volumes)
When it finish, a partition call EFI should be mounted.
Mount your USB EFI partition.
Copy the kexts and config to your EFI partition (like what you do before)