There is a build guide with similar parts to your own and the author does not mention any problems so it ought to be straightforward, I have no more ideas why this is not the case for you.
See
https://www.tonymacx86.com/threads/...z270-taichi-i7-7700k-geforce-gtx-1060.243513/
Hey P1LGRIM!
I hope all's well man. Listen, I've been trying still and even took the PC to a guy who said he's trying to go pro with making hackintoshes but he charged me €50 for nothing. No success. Told me I had to change my motherboard... however, I found this guy:
https://www.tonymacx86.com/members/justdatruth.1878906/
He has a VERY similar setup to mine!:
His:
Case: Fractal Design R5
PSU: BeQuiet Dark Power Pro 750
CPU: 7900X (BeQuiet Silent Loop 360mm)
MB: ASrock Taichi-XE (ASRock Thunderbolt 3 AIC)
GPU: Asus ROG Strix GeForce® GTX 1080 Ti OC / Gigabyte GTX780Ti OC WINDFORCE
RAM: 32GB Kingston HyperX Fury DDR4 2666mhz
HDD1: Toshiba RD400 m.2 500GB
HDD2: Samsung EVO 1TB 850
HDD3: 2TB WD Black Performance
Mine:
Case: Cooler Master Cosmos C700P
MB: ASRock X299 Taichi XE
CPU: i7-7820x
GPU: Gigabyte Aorus Geforce GTX 1080 Ti Xtreme 11G GDDR5x
PSU: 750 Watt Seasonic Prime Ultra Modular 80+ Titanium
RAM: 32GB (4x 8192MB) G.Skill Trident Z silber/rot DDR4-3600 DIMM CL15-15-15-35 Dual Kit
SSD: 500GB Samsung 960 Evo
HDD: 4TB WD Black
Current OS: Windows 10 (not activated/paid/official) on a partion of the 500Gb SSD (250Gb, the other 250 Gb I was going to use to install the MacOS)
I sent a reply to one of his posts to see how he did it:
https://www.tonymacx86.com/threads/...d-extended-guide.229353/page-679#post-1723458
I know you're a moderator. Would you be able to please approve my reply so I can get in touch with him?
If I succeed I'll send you all the details so you know, and if anyone ever needs it again it's all here.
Cheers man! Wish you the best!
I