MaLd0n

The Realtek ALC888B/ALC887 has only two physical analog ADCs. In this layout, the Rear Microphone uses one ADC, while the Front Microphone and Rear Line-In share the other. Because of this, Front Mic and Line-In cannot capture audio simultaneously. The main issue was the ADC handoff: when switching between them, macOS could try to start the new input before the previous one had fully released the shared ADC. The latest fix keeps all three inputs as separate devices while safely waiting for the shared ADC to be released before activating the next source. Use this and save new logs HDAUniversal-Release.zip

HDAUniversal-Release.ziptest 03

Wrong bootloader config

Test 02 HDAUniversal-Release.zipalcid=170

Reporting Issues If you find a problem with HDAUniversal, please report it with proper logs. Before posting, run the included log collector: Collect-HDAUniversal.command Download HERE

HDAUniversal-Release.zip Use alcid=170 and check if work

U need extract codec dump on linux or clover

HDAUniversal-Release.zip Test this

Yes. Have support for Tahoe. Enjoy!

SystemPulse-Release.zip This app is for Ventura+. Check if this version work, I changed support to Bigsur+.

UVCProbeFix is a macOS kernel extension designed to restore certain USB UVC webcams that are correctly detected by macOS but fail to produce a usable video stream, resulting in a black screen or a failed camera start. Confirmed Working – Lenovo IdeaPad S145 Ice Lake The fix has been verified through UVC runtime traces, not only by visual testing. Before UVCProbeFix was active, the webcam returned a malformed PROBE response: Frame: 4 Frame Size: 184549376 Payload: 16842753 Result: Start Stream Failed With UVCProbeFix loaded, the same camera negotiated: Frame: 1 Frame Size: 614400 Payload: 3072 Interval: 333333 The captured PROBE response and COMMIT were byte-for-byte identical, after which macOS selected Stream Alternate Setting 6, opened the USB streaming pipe and reported start streaming for client. The successful trace contains zero Start Stream Failed events. Hardware: Lenovo IdeaPad S145 Ice Lake Resolution: 640×480 YUV422 @ 30 FPS Result: ✅ UVC negotiation recovered and video streaming successfully started. The problem Some UVC webcams enumerate normally and expose valid video formats, but their firmware returns malformed values during the UVC PROBE/COMMIT negotiation performed by macOS. In the hardware case that led to this project, macOS selected a valid video mode, but the webcam returned an invalid GET_CUR(VS_PROBE_CONTROL) response containing incorrect frame-size and payload values. macOS then committed those invalid parameters and attempted to start the stream, which resulted in a black image / stream startup failure. The camera itself was functional. The failure happened during UVC negotiation. What UVCProbeFix does UVCProbeFix intercepts the affected negotiation path and applies a known-good recovery before macOS commits the broken configuration. For the currently verified hardware case, the original negotiation behaves approximately like this: macOS selects: Frame 4 640x480 30 FPS Camera returns: Frame size: 184549376 Payload: 16842753 macOS COMMIT: same invalid values Result: stream fails / black screen UVCProbeFix detects this broken negotiation and performs a controlled re-negotiation using the working equivalent UVC frame. The recovered negotiation becomes: Frame: 1 Resolution: 640x480 Interval: 333333 Frame size: 614400 Payload: 3072 macOS then commits the corrected values and the camera starts producing real image data normally. Important distinction UVCProbeFix is not a generic webcam driver and it does not replace Apple's UVC stack. It works alongside the existing macOS camera stack and targets a specific class of problems where: the webcam is detected; the UVC interface enumerates correctly; supported video formats are visible; PROBE/COMMIT negotiation occurs; but the camera firmware returns malformed negotiation values or a broken equivalent-frame path. Problems involving USB power, physical connection, proprietary camera protocols, missing device enumeration, sensor failure or unsupported codecs are outside this recovery path. Current release strategy The production Release currently preserves the physically verified recovery implementation for the known working case. The experimental branch also contains a descriptor-driven generic recovery engine intended to eventually support other webcams exhibiting the same class of UVC negotiation failure. The generic design does not rely on a specific VID/PID or fixed camera model. Instead, it is being developed to: parse the webcam's own UVC descriptors; validate the returned PROBE data; identify impossible frame-size or payload values; discover equivalent frames dynamically; perform at most one safe re-negotiation; leave healthy webcams completely untouched; fail closed when a correction cannot be proven. This generic path remains isolated from the stable Release until it passes sufficient real-hardware validation. Compatibility Initial target: macOS Tahoe Darwin 25.6 Intel x86_64 Lilu-based kernel extension environment The current recovery has been physically validated on the hardware that originally exhibited the black-screen UVC negotiation issue. Other webcams may exhibit a similar symptom for completely different reasons, so additional hardware must be analyzed before compatibility can be claimed. Future webcam support For additional webcams, the goal is not to create an endless VID/PID compatibility list. The intended workflow is: Passive UVC trace ↓ Analyze PROBE / COMMIT negotiation ↓ Parse the webcam's descriptors ↓ Identify the failure class ↓ Prove a safe recovery ↓ Add regression fixtures ↓ Test in Generic Recovery mode ↓ Hardware validation This allows future fixes to be based on UVC behavior and descriptor evidence, rather than camera brand or model. Safety The project follows a conservative recovery policy: healthy negotiations are passed through unchanged; no arbitrary frame or payload values are guessed; unsupported or ambiguous cases remain untouched; internal recovery attempts are bounded; the stable legacy recovery remains isolated from experimental generic code. Status The original black-screen webcam case is working again under the stable recovery path. Development is now focused on safely generalizing the same concept so that other UVC webcams with equivalent negotiation failures can potentially be recovered without camera-specific hardcoding. Download Kext HERE Download DUMP HERE Credits Special thanks to the developers and projects that made this work possible: Lilu by vit9696 / Acidanthera — kernel patching framework used by UVCProbeFix. MacKernelSDK by Acidanthera — kernel development headers and build support. Apple UVC / IOUSBHost stack — platform interfaces analyzed during development and debugging. Linux uvcvideo developers — valuable reference for UVC negotiation, descriptor parsing and recovery behavior. Olarila.com community — testing, feedback and hardware reports that help expand compatibility. UVCProbeFix development and research: DNMTechLabs / MaLd0n Contact: dnmtechlabs@gmail.com

U just need to use imac20 smbios

Dont use internal graphics, use RX6600m

This guide explains how to create an audio codec dump using Clover Bootloader or Linux. -Linux Use Ubuntu or other distro then run this tool HERE Download Ubuntu HERE -Clover You must already have the prepared EFI folder installed or copied to your EFI partition. Download EFI HERE Steps Boot your computer using the prepared EFI folder with Clover Bootloader. When you reach the Clover boot screen, do not boot macOS. Press the F8 key on your keyboard. You don't need boot to macOS! Clover will create a codec/audio dump automatically. Open your EFI partition. Go to the Clover folder: EFI/CLOVER/ Inside the Clover folder, look for a folder named: misc Compress the entire misc folder into a .zip file. Send me the zipped misc folder. Important Notes The F8 key must be pressed at the Clover boot screen, before booting macOS. Do not rename or modify the files created inside the misc folder. Send me the complete misc folder exactly as Clover/Linux created it. If the misc folder was not created, reboot and try pressing F8 again at the Clover boot screen.

no support for this