How to Fix iPhone Mirroring Screen Frozen in macOS Sequoia 15.x
Symptom: You launch iPhone Mirroring on macOS Sequoia, but the window remains black, or it shows a static image of your iPhone lock screen that doesn't respond to clicks.
Start with Fix 1: Kill the Remote Management Daemon. If the issue persists after that, try Fix 2: Reset Screen Sharing Preferences. Full Terminal commands and step-by-step instructions are in each section below.
Why this happens
This is often caused by a stalled remotemanagementd session or a failure in the hardware-accelerated video stream decoder on the Mac.
Recommended Troubleshooting Tool
Before proceeding with manual fixes, we recommend using CleanMyMac X. Quickly identify high CPU apps and optimize system memory with one click.
Fix 1: Kill the Remote Management Daemon
- Open Terminal.
- Run:
sudo killall remotemanagementd
- Relaunch the iPhone Mirroring app.
Fix 2: Reset Screen Sharing Preferences
- In Terminal:
defaults delete com.apple.ScreenSharing; killall ScreenSharing
Recommended Tool: CleanMyMac X
To clear system-level caches that might interfere with mirroring:
- Get CleanMyMac X to run the "Maintenance" scripts that flush the DNS and system caches responsible for device handshakes.