Live previews are blank
Enable Screen Recording, relaunch, and learn common limitations.
Symptoms
- Live previews are empty/black
- Hover preview never appears
Fix checklist
1) Confirm previews are enabled in Taskbar
Taskbar can show window lists without thumbnails, but “live” thumbnails require previews to be enabled.
- Window previews settings: Window previews
2) Enable Screen Recording
System Settings → Privacy & Security → Screen Recording
Enable Sulguni / Taskbar.
Guide: Screen Recording
3) Relaunch the app
Screen Recording changes usually require a quit/relaunch.
4) Know the limitation
Some windows can’t be previewed due to macOS restrictions (for example, protected video content).
If you see previews working for some apps but not others, that’s usually the reason.