A window switcher may show a window but still need Accessibility permission to focus or control it. macOS separates this control path from Screen Recording, which is commonly used for visual previews.
What Accessibility access means
Apple says third-party accessibility apps must be explicitly authorized before they can access and control the Mac through accessibility features. Review the request under System Settings > Privacy & Security > Accessibility and grant it only to an app you know and trust.
For a window switcher, Accessibility may expose window titles, current focus, and control actions. AltTab’s current FAQ says macOS requires it to read window titles or move focus. Exact use varies by product, so read the tool’s explanation and privacy policy.
Distinguish control from preview
Accessibility can enable focusing even when a visual thumbnail is unavailable. Screen Recording can enable a thumbnail while accurate focus still depends on a valid window identity and control permission. Granting both does not guarantee every app window is discoverable, resizable, or focusable.
Keep a native route
If you decline permission, use Command-Tab, app Window menus, Mission Control, or App Exposé where they satisfy the task. Wallo needs Accessibility for precise chosen-window focus. It does not use the permission as proof that every window match will succeed, and users can revoke access in macOS settings.