Mac Bluetooth headphone sound quality fix for AirPods, Sony WH-1000XM4, WH-1000XM5, WH-1000XM6, and other headsets.
MicLock is a tiny native AppKit menu bar app that keeps macOS from switching your input device to a Bluetooth headset microphone. That switch can force Bluetooth audio into low-quality two-way headset mode, making music, calls, games, and meetings sound compressed, muffled, or “telephone-like”.
- Latest release: MicLock 1.6.7
- Package: Developer ID signed and Apple notarized.
- Requirements: macOS 13.0+, Apple Silicon Mac (
arm64). - Install: download the zip, unzip it, move
MicLock.appto/Applications, then launch it. - Website: MicLock landing page
Homebrew:
brew tap WantbeFree/tap
brew install --cask miclockApple documents the root behavior: when a Bluetooth headset microphone is used, macOS can switch the headset into a lower-quality mode for simultaneous input and output. Community reports show the same pattern with AirPods, Sony WH-1000XM series, and other Bluetooth headsets.
MicLock does not “repair” Bluetooth microphone quality. It prevents the bad state by keeping input on a better microphone, such as:
- MacBook built-in microphone.
- Elgato Wave XLR or other USB/XLR interface.
- Studio microphone, webcam microphone, dock microphone, or display microphone.
- Any preferred CoreAudio input device saved as Primary or Fallback.
| Problem | What MicLock does |
|---|---|
| AirPods sound becomes bad on Mac after opening Zoom, Teams, Discord, Telegram, FaceTime, or browser calls | Restores your preferred input so AirPods stay output-only |
| Sony WH-1000XM4, WH-1000XM5, or WH-1000XM6 switches into headset mode | Keeps macOS from making the Sony microphone the default input |
| Mac reconnects Bluetooth headphones after sleep and chooses the headset mic | Refreshes devices after wake and reapplies Primary/Fallback order |
| USB/XLR microphone disappears after sleep or dock reconnection | Offers Refresh Devices and Revive Audio... without quitting the app |
| Preferred mic is unplugged | Falls through three saved fallback microphones, then to a safe built-in/non-wireless input |
| Saved mic is disconnected | Keeps last known device name visible, marked unavailable, so setup is not lost |
MicLock is device-agnostic. It works with CoreAudio input devices on Apple Silicon Macs. These are common devices and families people hit this problem with:
- Apple AirPods 1, AirPods 2, AirPods 3, AirPods 4.
- Apple AirPods Pro 1, AirPods Pro 2, AirPods Pro 3.
- Apple AirPods Max.
- Sony WH-1000XM4, Sony WH-1000XM5, Sony WH-1000XM6.
- Sony WF-1000XM4, Sony WF-1000XM5.
- Bose QuietComfort, Bose QuietComfort Ultra, Beats, Jabra, Logitech, and other Bluetooth headsets.
- USB/XLR setups such as Elgato Wave XLR, Focusrite Scarlett, Shure MV7, Rode, Blue, webcam microphones, Thunderbolt docks, and studio interfaces.
| Device or setup | Status | Notes |
|---|---|---|
| AirPods 1-4 | Supported | Best used as output-only while MacBook/USB mic stays selected |
| AirPods Pro 1-3 | Supported | Prevents macOS from choosing the AirPods microphone as default input |
| AirPods Max | Supported | Same Bluetooth headset-mode prevention workflow |
| Sony WH-1000XM4 | Supported | Keeps Sony headset mic from becoming default input |
| Sony WH-1000XM5 | Supported | Same WH-series Bluetooth input lock workflow |
| Sony WH-1000XM6 | Supported | Same WH-series Bluetooth input lock workflow |
| Elgato Wave XLR | Supported | Common Primary microphone setup |
| MacBook built-in microphone | Supported | Good fallback when USB/XLR is disconnected |
| Thunderbolt docks and USB hubs | Supported | Refresh Devices and Revive Audio... help after sleep or reconnect |
- Watches CoreAudio default input changes.
- Debounces audio-device storms during Bluetooth reconnects.
- Builds a fresh snapshot of available input devices.
- Resolves input in this order: Primary → Fallback 1 → Fallback 2 → Fallback 3 → safe non-wireless input.
- Sets macOS default input back to the resolved device.
- Keeps saved disconnected devices visible by stable UID and last known name.
- Runs as a menu bar app with no Dock icon.
| Menu section | Purpose |
|---|---|
| Saved inputs | Quick list of Primary and Fallback devices, with checkmark on active input |
| Refresh Devices | Re-enumerate CoreAudio input devices |
| Revive Audio... | Restart CoreAudio when USB/dock audio disappears after sleep |
| Input Selection | Choose Primary and three fallback slots |
| Open at login | Launch MicLock automatically |
MicLock uses semantic app versions plus Apple build numbers.
| Version | Build | Notes |
|---|---|---|
| 1.6.7 | 15 | Fixed fallback menu selection reverting to Disabled, Developer ID signed, Apple notarized |
| 1.6.6 | 14 | Fixed fallback selection persistence, Developer ID signed, Apple notarized |
| 1.6.5 | 13 | Developer ID signed, Apple notarized, Gatekeeper accepted |
| 1.6.4 | 12 | Developer ID signed package |
| 1.6.3 | 11 | Native Apple Silicon release with improved menu and release packaging |
Release artifacts are published on GitHub Releases. The current public package is notarized and should open without Gatekeeper warnings on supported Macs.
Requirements:
- macOS 13.0 or newer.
- Xcode 17 or newer.
- Apple Silicon Mac.
Build locally:
xcodebuild \
-project MicLock.xcodeproj \
-scheme MicLock \
-configuration Release \
-derivedDataPath build/ReleaseDerivedData \
CODE_SIGNING_ALLOWED=NO \
clean buildCreate a notarized release package:
DEVELOPER_ID_APPLICATION="Developer ID Application: Your Name (TEAMID)" \
NOTARYTOOL_PROFILE=MicLock \
scripts/build_release.shCreate an unsigned local test package:
scripts/build_release.sh --unsigned- No microphone audio is recorded.
- No network calls in the app.
- No analytics, telemetry, ads, or tracking.
- Settings are stored locally with
NSUserDefaults. - MicLock only reads CoreAudio device metadata and sets the default input device.
| Symptom | Fix |
|---|---|
| Headphones still sound bad | Open MicLock menu and confirm active input is not the headset microphone |
| USB mic missing after sleep | Use Refresh Devices; if still missing, use Revive Audio... |
| Saved fallback is unavailable | Reconnect the device or choose a new fallback slot |
| Menu bar icon not visible on macOS 26 | Check System Settings → Menu Bar and allow MicLock if macOS hides menu bar extras |
| App will not open | Download the latest notarized release from GitHub Releases |
When macOS uses an AirPods microphone, Bluetooth can switch into a two-way headset mode with lower output quality. MicLock keeps input on a better microphone so AirPods can stay focused on playback.
The Sony headset can enter the same Bluetooth two-way audio path when its microphone becomes active. MicLock prevents macOS from selecting the Sony microphone unless you explicitly choose it.
No. MicLock avoids the bad mode by selecting a different input device. It does not alter Bluetooth codecs or process microphone audio.
Yes. Set your preferred microphone as Primary. MicLock monitors CoreAudio changes and switches default input back when macOS or a meeting app chooses the headset microphone.
Yes. MicLock works with CoreAudio input devices, including MacBook microphones, USB microphones, XLR interfaces, webcams, displays, Thunderbolt docks, and USB hubs.
Yes. MicLock does not record audio, call network APIs, or collect analytics. It only reads device metadata and sets the default macOS input device.
- Apple Support: If sound quality is reduced when using Bluetooth headphones with your Mac
- Reddit: AirPods quality is terrible on Mac because the sound input switches to AirPods Pro
- Reddit: Bad sound quality on Sony WH-1000XM4 when using the mic
- Reddit: WH-1000XM5 sound quality is terrible while using microphone
- Macworld: Having problems with Bluetooth audio quality on a Mac?
MicLock is based on the original AirPods Sound Quality Fixer idea by Milan Toth and modernized for Apple Silicon, newer macOS releases, fallback microphone selection, signed/notarized distribution, and safer CoreAudio recovery workflows.
MIT. See LICENSE.