Hi there! I understand your MLB 9 Innings app is showing just a white screen and not responding on your Mac running OS X 10.15.7. Let’s get to the bottom of this together.

To start, could you tell me if this happens right after launching the app or does it start loading and then turn white? Also, have you tried restarting the app or rebooting your Mac yet?

Meanwhile, here are some initial steps we can try:

1. Force Quit and Relaunch the App:
- Click the Apple menu at the top left, select "Force Quit,"
- Find MLB 9 Innings in the list and force quit it,
- Then try opening it again.

2. Check for App Updates:
- Open the App Store on your Mac,
- Go to the Updates tab,
- If an update for MLB 9 Innings is available, please install it.

3. Clear App Cache or Temporary Data (If Applicable):
- Sometimes corrupted cache causes white screens, but Mac apps often don’t expose a straightforward way to clear cache.
- We may try uninstalling the app completely and then reinstalling it. To uninstall, drag the MLB 9 Innings app from the Applications folder to Trash, then reinstall it afresh from the App Store.

4. Check Network Connectivity:
- Ensure your internet connection is stable and working, as MLB 9 Innings requires internet to load game data.

5. Disable VPN or Proxy (if you use any):
- These can interfere with app connectivity.

If the white screen persists after trying these, we might need to check if there is any known service issue or bug affecting Mac users specifically, or try viewing any error logs if accessible.

Could you please try these and let me know how it goes? If the problem still isn’t fixed, I’m here to help with the next steps!

Are you ok with these steps for now?