Hi there! I see you're experiencing a black screen when opening the GasBuddy app on your Mac running OS X 10.15.7. Let’s get to the bottom of this.

To help me guide you better, could you tell me:
- Are you running GasBuddy via a web browser or a dedicated app on your Mac? The GasBuddy app is typically mobile, so if you’re using a browser, that’s helpful info.
- If it’s a browser, which one?
- Have you noticed this black screen issue happening recently after an update or change?

Meanwhile, here are some initial steps you can try:

1. If You’re Using a Browser:
- Refresh the page or close and reopen the browser.
- Clear the browser cache: On Safari, you can do this via Safari > Preferences > Privacy > Manage Website Data, then remove data related to GasBuddy.
- Try using a different browser (like Chrome or Firefox) to see if the issue persists.
- Disable any browser extensions that might interfere with page loading.

2. If You’re Using an iOS App on iPhone or iPad (if relevant):
- Make sure the app is updated to the latest version from the App Store.
- Force close the app and restart your device.
- Reinstall the app to clear possible corruption.
- Sometimes, shake your device while in the app to bring up reporting options if it’s misbehaving.

3. General Mac Troubleshooting:
- Restart your Mac to clear temporary system issues.
- Make sure your OS is fully updated (10.15.7 is Catalina, so verify security updates are applied).
- Check for any firewall or security software that may be blocking the app or website functionality.

Since the GasBuddy app is usually a mobile app, are you accessing it via some emulator on Mac or the website? Knowing this helps me tailor the advice precisely.

Let me know what you find with these, and if needed, we can dive deeper into app or network-specific fixes.

Are you okay with trying these steps?