Hi there! I see you're having trouble opening the Fox Nation app on your Mac. Could you tell me a bit more about what happens when you try to open it? Does the app not respond at all, show an error message, or maybe just keep loading but never opens fully?

Meanwhile, here are some initial steps you can try on your Mac running OS X 10.15.7:

1. Force quit the app if it's stuck:
- Click the Apple Menu (top-left corner) > Force Quit.
- Select Fox Nation if it appears and click Force Quit. Then try reopening.

2. Restart your Mac:
- Sometimes a simple reboot clears temporary glitches.

3. Check your internet connection:
- Make sure you have a stable network connection, as the app requires internet to open content.

4. Reinstall the app:
- Delete the Fox Nation app from your Applications folder.
- Then, download the latest version of the app from the official Fox Nation website or Mac App Store and reinstall it.

If after these steps it still won’t open, there might be some cache or deeper software conflict preventing it from launching properly.

Could you please try these and let me know how it goes? If needed, I can guide you through more advanced troubleshooting!