Hi there! I see your Meijer app won’t open on your Mac with OS X 10.15.7. Let’s try to get it working for you. Just to clarify, are you using the Meijer app through an emulator or is this the website in a browser? Also, do you get any error messages when trying to open it?

If it's the app itself, here’s a good starting point for troubleshooting:

1. Force Quit and Restart the App
On your Mac, press Cmd + Option + Esc to open the Force Quit Applications window. If the Meijer app is listed there, select it and click “Force Quit.” Then try reopening the app.

2. Check for Internet Connection
Ensure your Mac is connected to a stable internet network since the app needs it to work properly. Try opening a website in your browser to confirm.

3. Restart Your Mac
Sometimes a simple reboot helps clear any temporary glitches.

Since your OS version is 10.15.7 (Catalina), the Meijer app may run differently or have compatibility issues on macOS if it’s a mobile app used via an emulator. If it’s a browser-based issue, clearing browser cache or trying another browser might help.

If the problem continues, the best next step is to uninstall and reinstall the Meijer app or, if on browser, clear your browser cache and cookies:

- To uninstall on Mac: Drag the app icon from Applications to the Trash, then empty the Trash.
- Re-download the latest version from Meijer’s official site or App Store if available for macOS.

If you already tried any of these steps, please let me know, and we can dig deeper. Also, I can check some more detailed tips for Macs if needed!

Are you satisfied with this initial guidance, or should we try more?