UHD 770 is not officially supported by macOS. Apple never used these desktop chips. This guide uses fake IDs and spoofing to force the iGPU to work. Dedicated AMD GPU is strongly recommended.
Graphics-intensive apps (Final Cut, Photoshop, or even basic web browsers) may crash. uhd 770 hackintosh
The UHD 770 presents itself to the operating system with specific Device IDs. Critical Warning: UHD 770 is not officially supported
Avoid the RX 6700 XT, as it was never supported by Apple and will not work. Motherboard and BIOS Configuration Dedicated AMD GPU is strongly recommended
The last Intel-based Macs used Comet Lake (10th-gen) and Ice Lake (10th-gen mobile). Those chips used the graphics architecture (UHD 630). The UHD 770, however, uses the Gen12 (Xe-LP) architecture.