I am stuck on this log #[EB|LOG:EXITBS:START]

When trying to boot macOS ver iMacPro1,1 from a flash drive this is the last log that appears and it doesn't move further i followed the opencore install guide but it got me nowhere.
help plz.


my pieces :
cpu : ryzen 3 3100
gpu: GTX 780ti
motherBoard : AsRock B450m pro 4

config.plist attached