Supported macOS versions provide per-app Local Network controls under System Settings > Privacy & Security > Local Network. Choose access for the app’s documented local-device function. This permission is different from an Internet service account, and it should not be granted to every player by default.
Identify the application and requested task
Record the Mac’s installed OS version and the exact application. The checked Apple guide includes a version selector; use the matching guidance rather than copying another release’s screenshot. A managed Mac may have controls limited by its organisation.
Name the task that prompted the review, such as a publisher-documented search for a device on the local network. Keep that separate from opening an Internet playlist or signing in to a service. Do not assume all media apps need the same permission merely because they can play video.
Inspect the per-app setting
Apple’s current guide places the list in System Settings > Privacy & Security > Local Network. Inspect the named application and choose its intended access state. If the app or a required control is absent, record that fact instead of disabling broader security features.
Confirm the app’s publisher and documented purpose before changing a permission. A familiar-looking display name alone is insufficient reason to give an unrelated application more access. On shared equipment, agree the intended function with the owner and keep the previous state recoverable.
Make one task-specific comparison
This is a review workflow, not a report of a tested discovery session.
- Record the exact function that is unavailable.
- Check the application’s current Local Network state.
- Make only the relevant authorised per-app choice.
- Follow the publisher’s supported retry or reopen instruction if needed.
- Record whether that particular local-device function changes.
Keep the conclusion limited
If local discovery changes after a deliberate permission choice, record the app, OS and function. It does not establish the app’s media-format compatibility, a receiver’s playback support or the validity of a viewing account. If service login still fails, investigate that separate stage.
If the required state is enforced by management, use the administrator’s normal support route. Do not remove management controls or turn off the firewall as a substitute. The expected outcome is an intentional application permission with a documented purpose and a useful next question if the local task still fails.