Make sure you’re for UHD 770 (usually as UHD 630).
This problem occurs because macOS does not natively support the UHD 770 graphics found in CPUs like the i7-12700K, i7-13700K, or i9-14900K. As a result, the GPU fails to enter proper power-saving states (idle), leading to constant high temperatures, sometimes exceeding 70°C-80°C just sitting at the desktop.
“It’s fine,” he lied to himself. “CPUs can handle 100°C.”
Compatibility — macOS versions and expectations uhd 770 hackintosh hot
If you're still experiencing high temperatures, could you share: What specific CPU and motherboard are you using? Are you using a dedicated GPU (e.g., AMD RX 6600)? What is your current Idle temperature? AI responses may include mistakes. Learn more
Marco tried everything: -igfxfw=2 to disable firmware loading. igfxfbdump to inspect the runtime registers. He even underclocked the iGPU in the BIOS to 1.1GHz and lowered the voltage offset by -80mV. The heat dropped slightly—84°C. Still a space heater.
Since the iGPU is unaccelerated, letting macOS try to put it to sleep causes hot-plug failures. Ensure your SSDT-PLUG or SSDT-PM is configured correctly for your CPU cores, but do not map power states to the iGPU ( IGPU device in ACPI). Bios Settings Adjustments: Make sure you’re for UHD 770 (usually as UHD 630)
Navigate to > System Agent (SA) Configuration > Graphics Configuration . Set Primary Display to PEG (PCI Express Graphics). Set iGPU Multi-Monitor to Disabled . Save changes and exit. Software Workarounds (If You Cannot Buy a GPU)
: VT-x, Above 4G Decoding, Hyper-Threading, EHCI/XHCI Hand-off. 2. Key Kexts & Configuration
For most UHD 770 Hackintosh users: ✅ Set iGPU to + spoof UHD 630 + add igfxrpsc=1 → temps drop from 65°C to 48°C idle. “It’s fine,” he lied to himself
While the processing cores can handle instructions, the onboard UHD 770 display hardware cannot communicate properly with macOS. 2. What Happens If You Try to Boot with Only UHD 770?
Why is it such a "hot" topic?
If you are committed to using an Alder Lake or Raptor Lake CPU (which themselves work well with OpenCore patches), you must bypass the UHD 770 entirely: