Hi! I understand your 5-0 Radio Police Scanner app isn't working on your Mac running OS X 10.15.7. Let's see if we can get it back up and running smoothly.

To start, could you please tell me a bit more about the issue? For example:
- Are you unable to open the app at all, or does it open but not play any audio?
- Is this happening with all scanner streams or only specific channels or locations?
- Have you recently updated the app or your operating system?
- Have you tried any troubleshooting steps so far?

Meanwhile, here’s a general approach to resolve common issues with the 5-0 Radio app:

1. Restart the app and your Mac: Sometimes a simple restart helps refresh connections.
2. Check your internet connection: The app streams live audio and needs a stable internet connection.
3. Update the app: Make sure you have the latest version of 5-0 Radio installed. On macOS, apps may be updated through the App Store or the developer’s website.
4. Delete and reinstall the app: This often fixes corrupted files or settings causing problems.

Because you are on macOS Catalina (10.15.7), just make sure the app version you have supports this OS version.

Additionally, some users have reported that some scanner feeds may have been removed or moved to digital systems, which can cause channels not to play anymore. So, it’s also worth trying different scanner locations or channels in the app to see if others work.

Can you try the steps above, let me know if anything changes, and tell me more about what you’ve observed? That way, I can guide you with more specific instructions tailored to your situation.