Hi there! Sorry to hear that your NYT Games app isn’t registering a completed puzzle even though you’ve got a screenshot to prove it. That sounds unusual. Let’s get this sorted out together.

To help me understand better:
1. Which specific game and puzzle are you referring to?
2. Are you logged into your NYT Games account in the app?
3. Did the app freeze, crash, or show any error messages right after you completed the puzzle?
4. Have you tried any fixes so far, like restarting the app or your Mac?

In the meantime, here are some quick steps you can try on your Mac running OS X 10.15.7:
1. Force quit and restart the app:
- Press Cmd + Option + Esc, select the NYT Games app, then click “Force Quit.”
- Open the app again and see if it registers the puzzle completion.

2. Check your internet connection:
- Sometimes, the app needs to communicate with the server to update progress. Make sure you have a stable internet connection.

3. Log out and log back in:
- Within the app, try signing out of your NYT Games account and then signing back in. This can refresh your account status.

4. Update the app:
- While you didn’t mention this yet, ensure you have the latest version of the NYT Games app installed from the App Store, as updates often fix glitches.

If these don’t work, I can help with some deeper troubleshooting or assist in contacting support if needed. Let me know what you find after trying these!