Hi there! I understand your Vita Mahjong scores aren’t showing after you finish your games on your Mac running OS X 10.15.7. Let’s get to the bottom of this together.

To help me assist you better, can you tell me a bit more? For example:
- Are the scores not showing at all, or do they disappear quickly after the game ends?
- Have you noticed if this happens only with certain levels or all games?
- Is your device connected to the internet when this happens, or are you playing offline?

Meanwhile, here are a few quick steps you can try that often fix display or syncing issues with scores:

1. Restart the Vita Mahjong app completely:
- Quit the app fully, then reopen it. Sometimes the score display just needs a refresh.

2. Check your internet connection:
- Scores might need online syncing to show properly. Make sure your Mac is online and try again.

3. Restart your Mac:
- Sometimes a simple reboot helps clear temporary glitches.

4. Update the app:
- Check the App Store to ensure you have the latest version of Vita Mahjong, as updates often fix bugs.

If these don’t work, it might be an issue related to how scores are stored or synced in the app itself. Also, occasionally the score screen may disappear quickly, as some users reported in similar Mahjong apps.

Could you try those steps and let me know what happens? If the problem persists, I can guide you through checking app permissions or possibly logging back into your account in Vita Mahjong, if applicable.

Looking forward to your reply! Are you currently connected to Wi-Fi or playing offline?