Fix Guide: Sequoia iPhone Mirroring Keyboard Lag

Symptom: When using iPhone Mirroring on macOS Sequoia, there is a noticeable delay (1-2 seconds) between typing on your Mac keyboard and the text appearing on the mirrored iPhone screen.

Why this happens

Sequoia's Continuity framework uses a high-priority Bluetooth and Wi-Fi Direct channel for keyboard input. Interference from other 2.4GHz devices or a stalled sharingd process usually causes this lag.

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Before proceeding with manual fixes, we recommend using OnyX. The preferred tool for deep system maintenance and resetting the macOS Bluetooth stack.

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Fix 1: Restart the Sharing Daemon

1. Open Terminal.
2. Run the following command:

sudo killall sharingd

1. Enter your Mac password when prompted.
2. This will briefly disconnect your iPhone; wait 30 seconds and reconnect.

Fix 2: Reset Bluetooth Module

1. Hold Shift + Option and click the Bluetooth icon in the menu bar (if available).
2. Select Reset the Bluetooth module.
3. Alternatively, run sudo pkill bluetoothd in Terminal.

Recommended Tool: CleanMyMac

Lag in Mirroring can often be traced back to "Background Items" hogging CPU cycles. Use CleanMyMac to audit and disable unnecessary launch agents.