This repository documents the mechanism to fix the infamous AirPods "Connected but No Sound" issue on macOS when using third-party Bluetooth controllers.
For technical details regarding how we analyzed and bypassed Apple's bluetoothd HCI_Read_Clock dependencies across macOS 12.0 to 26.0, please refer to the main mechanism file:
👉 Read the A2DP Fast-Connect Process Document
Inside the /scripts directory, you will find the Python automation scripts used during the reverse-engineering analysis:
find_gate.py: A disassembler script that locates thebluetoothderror log injection block and identifies the exact byte offsets of the Fast-Connect Gate.verify_gates.py: A cross-validation script. It performs validation between our calculated hex arrays and the actual Apple binary files extracted from macOS BaseSystem to ensure byte-to-byte correctness.
This repository exists to organize documentation and analytical scripts. To view the modified source code, please jump to BlueToolFixup.cpp in the fork repository:
🔗 hexxyan/BlueToolFixup-FixA2DP
We would like to acknowledge the following AI models for their assistance in the research, code development, and documentation of this project:
- codex (gpt5.4-xhigh): Played an instrumental role in reverse engineering, identifying the binary patterns, and creating a stable, comprehensive single-gate patch structure that supports broad compatibility.
- claude (claude-opus-4.6): Contributed to documentation refinement and structuring.
- gemini (gemini-3.1-pro): Provided collaborative support in testing and logical verification.