Hi I have a Acceleration on High Sierra and QuickSync 1. Install High Sierra and 2. Install Clover or update to the last version and with Multibeast 9.2.1 use the HD 530 patch, iMac 14,2 or 17,1 Definition (and others patch for your system) 3.Install on /System/Library/Extensions (maybe works in EFI partition EFI/CLOVER/kexts/10.13) the next Kexts: 4. With the EFI partition mounted, edit your config.plist with Clover Configuration and use the nexts patches in the pictures: 5. Restart the system and you must have Full Graphics Acceleration and for the sound use de Toleda's ''audio_cloverALC-130_v0.3'' patch (and HDMI patch). I hope you help!