Hi there! I understand your batter in the MLB Home Run Derby iPad app is no longer swinging the bat, and you also mentioned you can’t find the game in the App Store. Let’s get to the bottom of this.

First, just to clarify:
- Is this issue happening every time you try to swing, or only occasionally?
- Have you recently updated your iPad OS or the app itself?
- When you say you can’t find the game in the App Store, are you searching by the exact name "MLB Home Run Derby," or are you looking under something else?

In the meantime, here are some steps to try:

1. Check for App Update or Removal
It seems like the MLB Home Run Derby app may no longer be available on the App Store, which could mean it has been removed or replaced. Sometimes games get pulled for updates or discontinued support. Double-check if the app is still listed by searching “MLB Home Run Derby” in the App Store exactly. If it doesn't show up, it may no longer be supported officially.

2. Reinstall the App (If found)
If you find the app on the App Store, try deleting it from your iPad and reinstalling it. That often resolves bugs including unresponsive controls.

3. Restart Your iPad
Sometimes a simple restart can clear up temporary glitches with touch input that could affect the swinging action.

4. Check Touch Screen Responsiveness
Make sure your screen is clean and your touch is registering properly on other apps or games. You can try other games or apps to verify.

5. Look for Alternative Apps
Since one search result mentioned a similar game called "Homerun Clash 2: Legends Derby" as available on the App Store, it might be worth trying if you want a baseball hitting game experience while MLB Derby is unavailable.

6. Sign In Issues
If you can open the MLB app but can’t play the derby, sometimes signing out and back in or checking your MLB account status helps ensure all game features work.

If you have already tried these or if the batter still refuses to swing, please let me know what you experienced, and we can try some deeper troubleshooting or check if there are known issues with the app on your OS X iPad environment.

Are you able to provide any more details about your current app version or any error messages you see? That would really help me pinpoint the problem better.