Hi there! I see you're having trouble with no audio on the First Alert 4 forecast on your Mac running OS X 10.15.7. I'd love to help you get that sorted out.

To start, could you tell me a bit more about this issue? For example:
- Is there no sound when you play any forecast videos or audio in the app?
- Are other sounds on your Mac working fine, like music or system sounds?
- Have you checked the volume and mute settings both on your Mac and within the First Alert 4 app?
- Did this problem begin after any recent updates to the app or your OS?

Knowing these details will help me tailor the solution better for you!

My iPad audio works fine, I’ve got audio for other Internet videos, but First Alert forecast has no audio.

Thanks for that info! Since other Internet videos have sound, and the issue is specific to the First Alert forecast on your Mac, it points to something with the app or how it interacts with your system sound.

A common cause on Apple devices is the mute or silent mode being enabled or sound output settings conflicting with the app's audio.

Here’s a step-by-step approach to try on your Mac:

1. Check System Volume and Mute:
- Look at the volume icon in your Mac's menu bar and ensure it's not muted or set very low.
- Also, check if the app itself has any in-app volume controls and that they're turned up.

2. Restart the App:
- Quit the First Alert app completely (right-click > Quit or Command + Q).
- Reopen it to see if audio returns.

3. Check Sound Output Device:
- Go to System Preferences > Sound > Output.
- Make sure the correct output device (e.g., internal speakers or your connected headphones) is selected.
- If you have other audio devices connected (Bluetooth, HDMI, etc.), try switching to internal speakers to test.

4. Update the App and macOS:
- Ensure the First Alert app is updated to the latest version via the App Store.
- Also, check for any pending updates for your macOS 10.15.7 in System Preferences > Software Update.

5. Test with Another User Profile:
- If possible, create a new user account on your Mac and log in there.
- Open the app and see if the audio works to rule out profile-specific settings or conflicts.

6. Clear App Cache or Reinstall:
- If the app stores temporary files, clearing cache might help. Since this is macOS, you can try deleting the app and reinstalling it from the App Store.

7. Check for App-Specific Mute Settings:
- Based on some reports for iOS apps, sometimes apps only play sound if the device mute is off. While your Mac does not have a physical mute switch, check any app settings for sound or video playback.

If after these steps the forecast audio still does not play, it could be a bug or server-side issue affecting the app on macOS.

Would you like me to check if there are any known issues specifically with the First Alert 4 app’s audio on macOS right now? Or if needed, I can guide you to contact First Alert support for a deeper look.

Are you okay with trying the above steps?