Ernest Posted August 17, 2019 Share Posted August 17, 2019 Hi. I'm trying to install High Sierra in a 775 build with q9550 and Sapphire Dual-X R9 270X OC 4 GB with this GPU-Z specs: https://www.techpowerup.com/gpu-specs/sapphire-dual-x-r9-270x-oc-4-gb.b2722. which is supposed to work OOB but I can only reach black screens and no signals. I tried all kinds of combinations with clover, lilu and wg, injecting framebuffer, patching kexts, etc... but I could only initialize the system in safe mode, graphics recognized as Amd Radeon HD 7xxx 4096 Mb and id device 0x6810; or using, this is a bit weird, id device 0x6811 with inject ati and fix display, in which case recognized as Amd Radeon R9 270x 8 Mb Vram and id device 0x6811 and of course without acceleration in any case. I have run out of ideas and would like to ask for your help, thank you for your great work and apologize for my bad English Send me iMac-de-woland.zip Quote Link to comment Share on other sites More sharing options...
Administrators MaLd0n Posted August 17, 2019 Administrators Share Posted August 17, 2019 [ref]Ernest[/ref], u try with radpg=15? DSDT.aml.zip Quote Support Olarila Vanilla Hackintosh by making a donation HERE About Premium Users you can check HERE Problems with Paypal HERE Link to comment Share on other sites More sharing options...
Ernest Posted August 17, 2019 Author Share Posted August 17, 2019 Yes, with and without radeondeinit and other combinations, resulting black screen. Thank you very much for the dsdt Quote Link to comment Share on other sites More sharing options...
