Hi! I understand that your Wordle game on your Mac is frozen and giving you the message "not enough letters" even though all the boxes are filled. Let's try to get this sorted out together.

First, just to clarify: when you say "all boxes filled," are you entering a full 5-letter word each time you try to submit? Or does it happen even after you type in a complete word?

Assuming you are inputting full words, this issue often happens because the browser's stored data for Wordle might be corrupted or out of sync. Since you're on macOS 10.15.7 and likely using a browser like Safari or Chrome, here are some steps to try:

1. Clear Browser Cookies and Site Data for Wordle
Sometimes Wordle relies on cookies and site data to track your guesses. Corrupted data can cause errors like "not enough letters." To fix this:
- Open your browser's settings (e.g., in Safari, go to Preferences > Privacy > Manage Website Data).
- Search for Wordle or the site where you play Wordle (often the New York Times domain).
- Remove cookies and site data related to Wordle.
- Restart your browser and try playing again.

2. Clear Browser Cache
Clearing cache ensures no old or corrupted files interfere. Usually under browser settings > Privacy or History > Clear Browsing Data > select Cache.

3. Try Using a Different Browser
If you usually use Safari, try Chrome or Firefox to see if the issue persists there.

4. Restart Your Mac
This clears temporary system glitches that might affect the browser or apps.

If none of these seem to work, there might be an issue with how the app or site version you're using processes input on your macOS version. Let me know if you've tried these, or if you'd like I can guide you through them step by step.

Are you using the Wordle app from the App Store or playing via a browser? That info can help tailor the solution.

Happy to assist you further!