Having huge issues trying to get any display out of my 1080Ti on a Mac Pro 5,1 (Mid 2010): I recently upgraded my Mac Pro 5,1 (Mid 2010) from Sierra 10.12.6 to High Sierra 10.13.1 through the app store Installed the ATI card that came with the Mac Pro, used that to install the update + High Sierra firmware update that was required Finished the update, installed the latest web driver (318.104.22.168.20.107) and the latest CUDA driver and shut down before re installing the 1080. Restarted with the 1080 but still had no display. Tried resetting PRAM, entering nvram boot-args="nvda_drv=1" in recovery mode but still nothing. I've been trying to fix this for about 2 days now and have tried multiple fresh installs of High Sierra 10.13.0 + 13.1 and even 10.12.6 which I previously had running fine but still no display. I'm able to remote desktop into the mac pro and everything seems to be fine apart form this. I am currently running 10.13.0 (17A365) with the 322.214.171.124.15.114 driver installed and the latest CUDA drivers. NVIDIA Driver Manger is loading the web driver on startup and seems to be working ok. However the Driver Manger itself doesn't seem to recognise the 1080Ti anymore. On System Preferences > NVIDIA Driver Manager under ECC the card is being displayed as 'Slot-1: pci10de,10ef' Under System Report the card is being shown as just NVIDIA Chip Model Firmware version : MP51.0084.B00 I've had this issue for a few days and have tried literally everything I can think of. Any help or information would be very much appreciated.