I'm running a Mac Pro 5.1 with a GTX 970 and a GT 120 installed. I've just wiped the SSD and now I'm stuck wrangling with MacOS's hyper-specific install requirements.
High Sierra won't let me install on the APFS partition it set up for itself previously so I'm trying to get to a point where I can reformat the drive entirely, but of course the recovery partition is mounted preventing me doing so.
The High Sierra USB install seems to have a common bug where it won't recognise the bluetooth mouse or keyboard. I have a wired mouse that its missing also. So that's a non-starter.
It seems my only option is Internet Recovery. However, holding alt+cmd+R just results in a black screen. EDIT: Looks like my model of mac doesn't support it at all, thanks David
Does anyone know the best course of action?