MacDebug

Verified for macOS Tahoe 26.2

How to Fix Universal Control Disconnecting in macOS Sequoia 15.x

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.

TL;DR fix

Start with Fix 1: Restart the Sharing Daemon. If the issue persists after that, try Fix 2: Reset Handoff via Terminal. Full Terminal commands and step-by-step instructions are in each section below.

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.

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.

Tested and documented by the MacDebug team — about MacDebug. See also Sequoia Universal Control 'Mouse Cursor Disappearing', Sequoia Universal Control Disconnects, or browse all guides on macdebug.