I tried to install Debian 11 on an Early 2014 MacBook pro and it didn't have video at all for me in the installer. I didn't pursue it after that. You have done a lot to get this to work.
I've tried different Linux distros on this computer and Manjaro was the best out of the box that I tried. I recently changed to Arch thinking that it was the true source of Manjaro's working, and it is not so much. I've got it to an OK state though.
Installing Debian on a MacBook Air Early 2014 · HackerTrans
I've tried different Linux distros on this computer and Manjaro was the best out of the box that I tried. I recently changed to Arch thinking that it was the true source of Manjaro's working, and it is not so much. I've got it to an OK state though.