Hi there! I understand that you're experiencing an issue where the payment button disappears after you add items to your cart on the Total Wine & More app. That definitely sounds like something we want to get fixed for you.

Just to clarify, are you using the Total Wine & More app on your Mac with OS X 10.15.7, or are you accessing the website through a browser? Also, have you tried any steps like refreshing the page, clearing your browser cache, or logging out and back in?

In the meantime, here are some initial steps we can try:

1. Refresh the Page or Restart the App: Sometimes, a simple refresh or restart clears temporary glitches.
2. Clear Browser Cache (if using the website):
- In Safari on your Mac, click on Safari in the menu bar > Preferences > Privacy > Manage Website Data > Remove All.
- Restart Safari afterward.
3. Try a Different Browser: If you’re browsing, sometimes browsers may behave differently. You could try Chrome or Firefox to see if the problem persists.
4. Check Your Cart: Sometimes if there’s a restriction or an issue with a specific item in the cart (e.g., out-of-stock or shipping restrictions), the payment button might not show. Try removing some items to test if that helps.
5. Update the App: If you are using the app (rather than the browser), make sure it is updated to the latest version available in the Mac App Store.
6. Disable Browser Extensions: Some extensions can interfere with page elements like buttons. Try disabling them temporarily.

If none of these work, it might be an account issue or a temporary glitch on our end. In that case, I can guide you through contacting our dedicated customer support or look into it deeper.

Could you let me know which of these steps you’ve tried already? That way, I can better assist you with the next best steps.