Thank you for that explination. I can confirm my igpu is active and running as expected.
If you think of anything that might be causing my audio issue in fcpx, it would be greatly appreciated. My setup is similar to yours, but I have also tried using your exact setup from your latest github files...still having the same issue.
My setup is as follows:
MB: Gigabyte Z270
GPU: ASUS Radeon RX 580
CPU: i7 7700k
Bios: dgpu is primary, igpu is enabled, dvmt memory is 128 (all other bios settings are standard hackintosh)
EFI: same as you, located in L/E/...except fakeSMC in Clover/kext/other
Config.plist: mine is attached and is a little different from yours...but as I said, I did try your exact .plist with same results
Audio: I'm using a digidesign digi003 audio interface which uses firewire. no issues with sound that I have found (other than scrubbing clips in fcpx before dragging them to timeline)