I used the Technolli guide for Z370 and got everything up and running with OpenCore 0.6 , and it seems like everything works so far. I actually ended up using his EFI folder from that machine and changed the model from 18,1 to iMac 18,3 to make dGPU the standard. I'll put the specs on the end of this post. There is just one problem, and it might not be a big one, but its annoying and I suspect it draws down performance as the iGPU can be used for computing. I use a RX 570 4GB card and that seems to be working perfectly, but during boot it keeps trying start up the iGPU but fails with a "IGPU Has data from ME never returned, status = 1, doing retry #XX" and after some time it gives: "IGPU Failed to initialize graphics firmware." and "IGPU failed to start graphics engine". These errors keep trying for about a minute, maybe more and makes the boot unnecessarily long and would of course like to have the extra power. Does anyone know how to make it work?
Specs:
Motherboard: Asus Prime Z270-P
CPU: Intel i5 7500 3.0 GHz
Memory: 2x8GB 2666MHz HyperX DDR4
Harddrives: 2x M.2 Intel 256GB
dGPU: Sapphire Nitro+ Radeon RX 570 4GB
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