Can you please share your EFI folder?
I've vanilla/fresh installed 10.14.6 using the EFI folder of Shubam on my Dell Inspiron 15 7559 with BIOS version 1.3.0, i7-6700HQ, 16GB RAM, HDD and FullHD screen.
It's booting up, but Intel Graphics, Keyboard, Touchpad, Brightness, etc are not working...
Update: I've successfully installed MacOS Sierra on the Gigabyte Motherboard with F5b BIOS. It is fully compatible and does not require any dsdt file.
In BIOS, load optimized defaults and AHCI is enabled.
After installation, in MultiBeast:
QuickStart: Legacy Boot Mode