Fix Guide: Sequoia Universal Control "Cursor lag" on iPad

Symptom: When using Universal Control to move your Mac's cursor to an iPad on Sequoia, the mouse movement feels "heavy" or "laggy," making precise clicking difficult.

Why this happens

This lag is typically caused by Wi-Fi interference or a bottleneck in the UniversalControl.framework when it tries to sync the high-polling rate of a gaming mouse or high-DPI mouse with the iPad's display refresh rate.

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Fix 1: Lower the Mouse Polling Rate

1. If you are using a gaming mouse, open its configuration software (e.g., Logitech G Hub).
2. Lower the Report Rate (Polling Rate) to 125Hz or 250Hz.
3. High polling rates (1000Hz+) often saturate the Bluetooth/Wi-Fi side-channel used by Universal Control.

Fix 2: Refresh the Sidecar/UC Connection

1. Disconnect the iPad from Universal Control.
2. In Terminal, run: killall "Universal Control"
3. Reconnect the iPad from the Displays menu in System Settings.

Recommended Tool: CleanMyMac

Network interference and background process lag can ruin the Universal Control experience. Use CleanMyMac to identify and disable background apps that are hogging CPU or network bandwidth during your work session.