I wouldn't expect Apple to make it that easy given their history of extremely overpriced video cards and custom BIOSes for them. I would be shocked if an extern

I wouldn't expect Apple to make it that easy given their history of extremely overpriced video cards and custom BIOSes for them. I would be shocked if an external GPU solution on Macs were supported and sold for less than $700 and Apple-approved GPUs go for less than 30% mark-ups from aftermarket retail pricing. So at that point I'd honestly expect an Apple GTX 1080 solution to cost well over $1500. For that price almost anyone would just buy a dedicated gaming machine and not bother with the Apple ecosystem that's hostile to PC gaming by default.