Hackintosh HDMI Audio Issue - HD4600 Haswell Desktop
System specs:
- CPU: Intel Core i5-4440 (Haswell)
- GPU: Intel HD Graphics 4600
- Motherboard: Gigabyte B85 series
- macOS: Sequoia 15.4.8 with OCLP root patch
- OpenCore: 0.8.8 (via OpCore Simplify)
- SMBIOS: iMac14,4
- Framebuffer: 0x0D220003
Problem: IOHDACodecDevice@3,0 stays !registered, !matched — HDMI audio never initializes.
What we confirmed works:
- Video acceleration with OCLP root patch ✅
- Analog audio (ALC892, layout-id 1) ✅
- All connectors showing as HDMI (connector-type = 00080000) ✅
- hda-gfx = onboard-1 injected on HDEF, IGPU and HDAU ✅
- device-id = 0x0C0A spoof on HDAU ✅
- AppleHDAController loads and creates child IOHDACodecDevice@3,0 ✅
What we tried without success:
- All BusID values (0x01, 0x02, 0x04, 0x05, 0x06) on con1/con2
- framebuffer-conX patches (type, busid, flags, pipe)
- framebuffer-con0-alldata replacement
- hda-gfx on all three PCI paths
- device-id spoofing (0x0C0A)
- WhateverGreen boot args (-igfxhdmidivfix)
- Modified CodecAddressFilterArray in both /System and /Library AppleHDAController.kext to include Intel codec PCIVendorDeviceID = 2155905031 (0x80862807)
- Rebuilt kext cache after modification
Root cause identified: AppleHDAController has a CodecAddressFilterArray that only whitelists Realtek codecs. Even after modifying both copies of the kext, the IOHDACodecDevice@3,0 still won't register. The OCLP legacy framebuffer driver (AppleIntelFramebufferAzul) appears to not send the display-active signal that the HDA codec needs to initialize.
Question: Has anyone successfully achieved HDMI audio with HD4600 iGPU on macOS Sequoia with OCLP? What specific fix was required? Help me
Hackintosh HDMI Audio Issue - HD4600 Haswell Desktop System specs: - CPU: Intel Core i5-4440 (Haswell) - GPU: Intel HD Graphics 4600 - Motherboard: Gigabyte B85 series - macOS: Sequoia 15.4.8 with OCLP root patch - OpenCore: 0.8.8 (via OpCore Simplify) - SMBIOS: iMac14,4 - Framebuffer: 0x0D220003 Problem: IOHDACodecDevice@3,0 stays !registered, !matched — HDMI audio never initializes. What we confirmed works: - Video acceleration with OCLP root patch ✅ - Analog audio (ALC892, layout-id 1) ✅ - All connectors showing as HDMI (connector-type = 00080000) ✅ - hda-gfx = onboard-1 injected on HDEF, IGPU and HDAU ✅ - device-id = 0x0C0A spoof on HDAU ✅ - AppleHDAController loads and creates child IOHDACodecDevice@3,0 ✅ What we tried without success: - All BusID values (0x01, 0x02, 0x04, 0x05, 0x06) on con1/con2 - framebuffer-conX patches (type, busid, flags, pipe) - framebuffer-con0-alldata replacement - hda-gfx on all three PCI paths - device-id spoofing (0x0C0A) - WhateverGreen boot args (-igfxhdmidivfix) - Modified CodecAddressFilterArray in both /System and /Library AppleHDAController.kext to include Intel codec PCIVendorDeviceID = 2155905031 (0x80862807) - Rebuilt kext cache after modification Root cause identified: AppleHDAController has a CodecAddressFilterArray that only whitelists Realtek codecs. Even after modifying both copies of the kext, the IOHDACodecDevice@3,0 still won't register. The OCLP legacy framebuffer driver (AppleIntelFramebufferAzul) appears to not send the display-active signal that the HDA codec needs to initialize. Question: Has anyone successfully achieved HDMI audio with HD4600 iGPU on macOS Sequoia with OCLP? What specific fix was required? Help me