Fix Guide: Sequoia iPhone Mirroring Audio Lag

Symptom: When using iPhone Mirroring on macOS Sequoia, the video is fluid but the audio lags behind by 1-2 seconds, or cuts out entirely.

Why this happens

This is usually caused by the "Sidecar" audio daemon (sharing the same engine) getting stuck in a high-latency buffer state or interference on the 5GHz Wi-Fi band.

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Fix 1: Kill Audio Daemons

1. Open Terminal.
2. Run the following command to reset the core audio process:

sudo killall coreaudiod

1. Then, reset the specific mirroring transport:

killall rapportd

Fix 2: Disable AWDL (Temporary)

Apple Wireless Direct Link can cause interference.

1. Run this in Terminal to disable it:

sudo ifconfig awdl0 down

1. Note: This will temporarily disable AirDrop until you run sudo ifconfig awdl0 up.

Recommended Tool: CleanMyMac X

To keep your system daemons running lean:

- Get CleanMyMac X to run periodic maintenance scripts that flush system caches and reset DNS without needing Terminal.