August 4, 2010
I used efi rom from new imac’s 5750 and original 5770 pc rom to create custom hybrid rom.
It works in osx, no injector used.
Since I used mobility ATI rom we have nothing from card on boot, but once osx booted – the card works.
Both dvi ports work, displayport works too, 3 displays doesnt work atm.
Once we have macpro’s 5770/5870 roms boot screen should work too. But for now you can already enjoy 5770 in your macpro.
It only works on 2008+ macpros, because efi is 64-bit now, not ebc anymore.
screenshots and the rom:
before flashing you also need to install driver.
Also, 5870 is working too in macpro.