Hi Feartech - Im trying to get the remaining issues in my High Sierra build sorted. Since writing I have sorted out the onboard USB issues by using Rehab mans guide re patching his kext, and both e sata and USB ports onboard are now functioning. However, I have a 3rd party 7 port USB 3.0 PCIe controller that worked as plug and play on sierra but its not being seen on High Sierra at all. There are no Mac drivers for that card at all, or any other card i dont think. ....so Im wondering if theres a kext that will help PCIe card recognition. In my Sierra EFI there are two Fake PCIID kexts that are not in High Sierra EFI as I used someone elses EFI (another member) as the basis for this build as I couldn't get my previous one to boot. The other issue Im having is restarting by itself after shutdown . I see there are a few threads on this.......The final thing thats odd is a few times when I boot I get a boot failure with BIOS telling me I need to adjust it as the settings aren't right. The BIOS settings are based on my Sierra settings, so I go through and save BIOS without changing anything and next time it boots ok. I suspect theres a setting in there it doesn't like but no idea which one. .........After weeks of trying, and some difficult obstacles to overcome, Im almost there with this build thanks to the help Ive had here.....just the above left to go