Slice (or any dev), are you aware that enabling Above 4G Decoding in the BIOS will not allow MacOS to start up? It is an old issue, but I cannot remember if I have seen it discussed in this thread. I have tried with both Clover & Chameleon, so this is more of a feature request than a bug.
You can see ASUS's description of 4G Decoding here: https://www.asus.com...rt/FAQ/1004170/
However, is there any way to address this within the bootloader, or is this purely a kernel problem? Theoretically, any 64-bit OS should be capable of this, correct?
The reason I ask is that if you have 2x GTX 9xx series cards, as well as working Thunderbolt, then the motherboard will fail to POST until you enable 4G Decoding. At that point Windows 7 or higher will load, but MacOS will now restart while loading.