So I have a 7700k/z270 Gaming7/evga1080 setup on Sierra that served me well for a while, but somehow (probably inadvertently updated something on a late night working) pretty much ruined the install. It used to fully boot to a black screen, suggesting that something in my NVidia drivers or my port configuration got jacked up. In an attempt to fix it, it now hangs before boot and won't even reach the Apple boot screen (just hangs in verbose mode).
I'm currently trying to get everything back up and running.
I have tried:
Trying to fix the initial video issue from clover bootloader's shell ( I broke it even more and it now won't even boot)
Creating a Vanilla Sierra USB to boot from - this couldn't see my existing NVME Sierra Install
Creating a Vanilla High Sierra USB to boot/install a fresh copy and then maybe migrate the old install? - this could see my old install but wouldn't boot it.
What do I do?
TLDR; Old Sierra Install got ruined through updates, now I can't seem to get a new Vanilla USB to successfully start the old OS.
P.S I've learned my lesson on backups the hard way.
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