Hey guys, i've taken a shot at installing Mojave. Everything seems fine, except the Graphics part. I've tried 2 things to get my old R9 270 to work:
1. Add my device id 0x68111002 to AMD7000Controller.kext, AMDRadeonX4000.kext and AMDRadeonX4000HWServices.kext. I rebuild caches with KextUtility...