Hi there! I understand that your DISH Anywhere app on your Mac starts to work but then the screen scrambles and you get a message saying it lost connection. That definitely sounds like something we should get sorted out so you can enjoy your content smoothly.

To help me get a clearer picture, could you tell me a bit more? For example:
- When exactly does the scrambling happen? Right after starting a stream or after some time?
- Are you using the app via a web browser or a specific DISH Anywhere app for Mac?
- Is your internet connection stable otherwise (such as streaming on other services)?
- Have you recently updated your macOS or the DISH Anywhere app?

Meanwhile, here are some initial steps to try that often resolve connection and screen issues on macOS 10.15.7 (Catalina):

1. Check Your Internet Connection:
- Make sure you have a stable high-speed connection.
- Consider restarting your router/modem.
- Try streaming something else just to confirm connectivity.

2. Update the App or Browser:
- If using the DISH Anywhere app, ensure it is updated to the latest version.
- For browser use, verify your browser is updated (Safari, Chrome, or Firefox).
- Sometimes outdated software causes display glitches.

3. Clear Cache and Cookies:
- If on a browser, clear the cache and cookies. This removes old data that might cause issues.
- In Safari: Click Safari > Preferences > Privacy > Manage Website Data, then remove DISH-related data.

4. Restart Your Mac:
- A simple reboot can clear glitches affecting display or connection.

5. Check for macOS Updates:
- While you mentioned 10.15.7, make sure all minor updates are applied in System Preferences > Software Update.

6. Test Another Browser or Device:
- If you are streaming on a browser, try using a different one to see if the problem persists.

7. Log Out and Log Back In:
- Sometimes your session can get corrupted. Log out of DISH Anywhere and log back in.

If you've tried these already, we can proceed to more advanced troubleshooting like checking for interference, reinstalling the app, or checking your DISH account for any server-side issues. Let me know how these steps go or if you'd like me to walk you through a specific part!

Are you satisfied with this starting point?