I am very happy for youHi every one.
Today I manage to install OS X 10,15,4 using OpenCore on my Asus x99-a with i7 5820k Asus strix Vega 56.
I followed the OpenCore vanilla guide for Haswell-e. With some Very Important Exceptions:
1. Don't use DevirtualiseMmio quirk on the boot section of config.plist. This causes a panic before the kernel even loads.
2. Don't need to emulate CPU on the Kernel section of config.plist. Just leave Cpuid1Data and Cpuid1Mask clean. (kernel Panic again).
3.Need to patch IOPCIFamily (IOPCIFamilyPatch ©PMHeart) on the Kernel section of config.plist.
4. Need to ad npci=0x2000 boot-arg on NVRAM section of config.plist.
4.* For Vega 56 use agdpmod=pikera Boot-args
Post install: Remember to compile your SMBIOS info using GenSMBIOS-master on the platform info section of config.plist And Your prev-lang:kbd NVRAM.
I still need to clean and test a lot, but at the moment I'm very happy with this hack. I never Booted this fast on this build.
Thank you Very Very Much to user Jpevrard for your help, people like you make Hackintosh a great community.
if I say no ******** normally if you flash your BiosI am very happy for you
good to you friend