I used to use an EDID patcher written in Ruby but it stopped working on some version of macOS. Contained in that script is how it patches the EDID data which is what I got to work with BetterDisplay.
FWIW, here's the hacked script[0] which only keeps the EDID data patching part. Be warned it's very hacky with the base64 EDID to be patched hard-coded in line 8 of the script. It prints out the patched EDID base64 which should be entered back into BetterDisplay (which is also where you can get the unpatched base64 EDID).
FWIW, here's the hacked script[0] which only keeps the EDID data patching part. Be warned it's very hacky with the base64 EDID to be patched hard-coded in line 8 of the script. It prints out the patched EDID base64 which should be entered back into BetterDisplay (which is also where you can get the unpatched base64 EDID).
[0] https://gist.github.com/karmakaze/f795171a6a795491e754c3d092...