Problem solved with a custom EDID, the original won't work. Custom personalities and Hoolock work well !
I was wondering if you could give me a few hints on how install Sierra on my old 5740G.
Back in 2011/12 I managed to install ML and get most of the sistem working. It's been a long time and since then many things have changed (bootloaders, AMD io ATI kexts etc).
I'm trying to install but cannot get past the installation process and I'm stuck at "waiting for root...".
Would appreciate if you could give me some pointers I could follow. My laptop has a i5 520M io your i7 640M. I have a Toshiba 120G SSD.
Our machines are 'old timers' but still run quite nicely