Hello everyone  Thank you very much for your wonderful and useful forum  I want share with you after long search and fixes my final EFI Partition for Dell Precision WS M6800 & M4800 and will work 99 % on any similar Model    All files , Kexts , ACPI , Guide are all included in zip file linked below    This my final EFI with alots of fixes and tweaks works for both High Sierra and Mojave only you will need Nvidia web drivers and Cuda to get fully working machine