Hello! I understand that your AccuWeather Radar is just showing a blank screen on your Mac running OS X 10.15.7. Let's get this sorted out together.

First, could you tell me a bit more about when this started? For example:
- Is it happening only in a particular browser, or all browsers you use?
- Have you tried refreshing the page or restarting your browser?
- Are other parts of AccuWeather or other websites working fine?

Meanwhile, here are some simple steps you can try to resolve the radar display issue:

1. Refresh the Page: Sometimes the radar might get stuck loading. Press Command + R to refresh the page.

2. Clear Browser Cache: Cached files might cause display problems. Since you're on macOS, here’s how you can clear cache in Safari:
- Open Safari.
- Click "Safari" in the top menu, select "Preferences."
- Go to the "Privacy" tab.
- Click "Manage Website Data."
- Search for AccuWeather or clear all website data to be thorough.
- Click "Remove" and then "Done."
- Close and reopen Safari, then try accessing the radar again.

3. Try a Different Browser: To check if the issue is browser-specific, open another browser like Chrome or Firefox and load the radar page.

4. Check Internet Connection: Make sure your internet connection is stable and not blocking any content.

5. Disable Browser Extensions: Some browser extensions (like ad blockers) can interfere with content loading. Temporarily disable extensions to see if that fixes the radar display.

If you’ve already done any of these, please let me know, and we can try more advanced troubleshooting such as checking browser console for errors or resetting app settings if you’re using the AccuWeather app.

Does any of this sound like something you’ve tried already? Are you accessing the radar via a browser or the AccuWeather app on your Mac?