Now it seems to work! I had not checked the updated guide in Post 1, so I missed that there was this new MultiBeast with whatevergreen support. I'm using system definition iMac 18,3. I have iGPU (headless) and Vega56 active at the same time. Only thing I need to fix now is iMessage. Thanks for the help!
Edit: OK. I was too fast to write here. Both cards are active but when running an export from Final Cut Pro X the machine reboots. So, something is not correct. Any ideas?
Edit2: I was able to fix this crashing FCPX by creating a patch in hackingtool following
this guide. I open whatevergreen, selected FrameBuffer MacOS 10.14. PlatformID: 0x3E910003 then clicked patch and Generate Patch. I pasted following to the Devices section in plist.conf and rebooted. Now i run BruceX in 14 sec. and have iGPU enabled with Vega56
Code:
<key>Properties</key>
<dict>
<key>PciRoot(0x0)/Pci(0x2,0x0)</key>
<dict>
<key>AAPL,ig-platform-id</key>
<data>
AwCRPg==
</data>
</dict>
</dict>