Hi there! I see you're having trouble with the Old Navy app not connecting to the internet for shopping on your Mac running OS X 10.15.7. Let’s get to the bottom of this together.

Could you tell me a bit more about what happens when you try to use the app? For example, does it show an error message or just fail to load? Also, are you connected to WiFi or using a cellular connection through a hotspot?

In the meantime, here are some steps to try that usually help with connection issues on the Old Navy app:

1. Check your internet connection: Make sure your WiFi or hotspot connection is stable by trying to visit other websites or apps on your Mac.

2. Restart your Mac: Sometimes a simple reboot helps refresh network connections.

3. Clear app cache and data (if applicable on Mac): Since this is a Mac, if you’re using a web browser rather than a native app, try clearing your browser cache and cookies. Here’s how you can do it on Safari:
- Open Safari, click on Safari in the menu bar, then "Preferences."
- Go to the "Privacy" tab and click on "Manage Website Data."
- Remove data related to Old Navy or all website data if comfortable.

4. Try using a different browser: If you’re shopping via Safari, try switching to another browser like Chrome or Firefox and see if that helps.

5. Update your Mac OS and browsers: Running the latest updates can fix compatibility issues.

If these don’t help, the app or service itself might be experiencing temporary issues, or there could be a more specific network setting interfering. Let me know what you've tried so far and any error messages you see, and we can dive deeper from there.

Are you able to try these steps now?