R9 290X with MacOS Sierra

Hello guy, I have a Gigabyte R9 290X, and I have a black screen when I want boot for the first time on my HDD. I don't have iGPU (i7 920 1366 with Intel x58 so no Intel graphic card). How can boot ? Which options I must change in Clover ?


Edit : The first boot work only with Inject ATI, fb Lagotto, and safe mode + verbose mode