Fix Guide: Sequoia Universal Control Disconnecting

Symptom: You move your mouse to the edge of your Mac to control your iPad, but the cursor hits a "wall" and won't cross over, or it disconnects after a few seconds.

Why this happens

Universal Control relies on the sharingd process. On Sequoia, this process can hang if the Bluetooth Low Energy (BLE) advertisement packet is dropped due to Wi-Fi interference.

Recommended Troubleshooting Tool

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

- [Download OnyX Free Here](#)

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Fix 1: Restart the Sharing Daemon

1. Open Terminal.
2. Run:

sudo killall sharingd

Fix 2: Reset Handoff via Terminal

1. In Terminal:

defaults write com.apple.coreservices.useractivityd ActivityAdvertisingAllowed -bool no

defaults write com.apple.coreservices.useractivityd ActivityAdvertisingAllowed -bool yes
killall useractivityd

Recommended Tool: ToothFairy

To manage the Bluetooth connections that Universal Control relies on:

- Get ToothFairy to see real-time connection status and signal strength for your Apple peripherals from the menu bar.