After 3 failed attempts to install the web driver with SIP disabled, I followed the advice in the link I posted after removing the SIP patch via your instructions (thank you), enabled SIP and now have the latest Nvidia driver installed.
The installation of the web driver did require SIP to be enabled contrary to your comment...
"The nVidia Web Driver doesn't require SIP to be enabled to install"
Anyhow after re-disabling SIP all is well again and I'm back running High Sierra.![]()
I'm always using my Mac's with disabled SIP and disabled gatekeeper. Always used nVidia Web drivers, and never noticed any problem with it. Maybe, you have enabled gatekeeper, and sometimes enabled gatekeeper with disabeld SIP creating strange things and error messages. Maybe, this is the main problem, not the disabled SIP.