ok, so i have a major problem. have a mac pro 4,1 flashed to 5,1 with updated firmware aka 144.0.0.0.0 and installed opencore with sip disabled. that all worked, now when i bless then restart, i see the bootloader, and when i select the mac hd, it shows the progress bar then goes to black screen. the monitor used is one hooked up via hdmi. only way i can see anything is by plugging a monitor into the dvi on my rx 570 and then i can see the desktop but nothing on the hdmi. if i have any other monitor plugged into the dvi or display ports, i don't see the bootloader.
is there a way to make it so that hdmi displays the bootloader and the desktop afterwards? (if someone says use a config file, please explain... (command line n00b here))
*edit* using opencore 0.7.2 file