Fix Guide: Sequoia iPhone Mirroring "Mic in use" Errors

Symptom: When using iPhone Mirroring on macOS Sequoia, a persistent "Microphone in use" notification appears, or the mic fails to pass through to Mac apps.

Why this happens

The Sequoia audio subsystem (coreaudiod) sometimes fails to release the virtual microphone bridge created during the mirroring handshake.

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Fix 1: Kill the Core Audio Daemon

1. Open Terminal.
2. Force a restart of the audio subsystem:

sudo killall coreaudiod

1. Re-launch the iPhone Mirroring app.

Fix 2: Reset Screen Recording Permissions

1. Go to System Settings > Privacy & Security > Microphone.
2. Toggle "iPhone Mirroring" off and back on.
3. Do the same under "Screen Recording."