Hi,
Sorry for my english.
I had tried with your provided clover pack and efi drivers in my laptop with clover bootloader but macos install option not appearing in clover efi mode (refer attached screenshot of uefi as well legacy mode)
Correct me on below points,
1. I have make USB high Sierra with olarila .Raw file using balena etcher application.
2. Using mini partition tools to replace EFI folder.
3. Changed to efi partion system from mini partition tools and apply it.
Attached herewith my EFI folder for your inspection.
Thanks in advance.
EliteBook_8730w_Clover_Pack-EFI.rar