Don Mick

hi there, thank you very much, that did correct the issue, but when i recently added an Asus Thunderbolt EX3, The system was stuck at PCI Configuration Begin. i was able to boot after removing the custom DSDT. Would you be able to repatch now that I have this card in? I'm already on mac pro 7,1 added_thunderbolt_ex3_Send me x99catainasiPro.7z

Thanks for your reply, is that the only change your suggest?

Hello, Please see the attached results Send me x99catainasiPro.7z

Ok, my issue is as follows: X99 Asus board + i7-6850k (overclocked to 4.0ghz) + Radeon VII keep going to black screen. usb may or may or may not recover, and the only option is hard reset. i've seen several posts in different forums about this, and my attempted fix was to have opencore disable AppleGFXHDA, but the problem continues Opencore EFI folder for X99-A/USB3.1, i7-6850k, Radeon VII. The DSDT dumped for the system and kernel stream log of the issue are also included Compressed file.7z