Hi there! I understand you’re having trouble logging into the ShopRite app on your Mac with OS X 10.15. Let’s get to the bottom of this together.

Could you tell me a bit more about what happens when you try to log in? For example:
- Do you get an error message? If so, what does it say?
- Have you tried resetting your password through the “Forgot Password” option?
- Are you using the ShopRite website or app? (Since your device is a Mac, I want to confirm whether it’s through a browser or if you’re using an app via some method.)

In the meantime, here’s a straightforward checklist to try:

1. Clear your browser cache and cookies
Sometimes old data can cause login issues. On your Safari browser (assuming you're using Safari on macOS 10.15):
- Go to Safari > Preferences > Privacy.
- Click on "Manage Website Data" and remove data for shoprite.com or clear all if comfortable.
- Then restart Safari and try logging in again.

2. Try a different browser
If you’re using Safari, try Chrome or Firefox to see if the problem persists.

3. Reset your password
Use the “Forgot Password” option on the ShopRite login screen to reset your password, in case the issue is password-related.

4. Check internet connection
Make sure your Mac is properly connected to the internet and that there isn’t a firewall or network setting blocking access.

5. Verify your account status
If you recently registered, confirm your email address by checking your inbox (and spam folder) for any confirmation emails from ShopRite.

Please let me know which of these you’ve tried or if you've noticed any specific error messages, so I can guide you to the next best step!