Hi there! I understand you’re having trouble updating the myID app when prompted on your Mac running OS X 10.15.7. To help fix this, can you tell me a bit more about what happens when you try to update? For example:
- Do you see any error messages or codes?
- Does the update start but never finish?
- Are you updating through the App Store or within the myID app itself?

Knowing these details will help me guide you better. Meanwhile, here are some general steps you can try:

1. Check Your Internet Connection: Make sure your Mac has a stable internet connection. Sometimes updates fail if the network drops mid-way.

2. Restart the Mac: A simple restart can resolve temporary glitches that block updates.

3. Update via the Mac App Store: Open the App Store app, go to Updates tab, and see if myID is listed. If yes, try updating it from there.

4. Check for macOS Updates: Sometimes the app requires a newer OS version. Go to Apple menu > System Preferences > Software Update to see if OS X 10.15.7 is up to date.

5. Clear Cache for App Store: Sometimes the App Store cache causes update issues. You can try signing out and back into the App Store under Store > Sign Out, then sign in again.

6. Reinstall the myID App: If updates fail repeatedly, try deleting the app and reinstalling it fresh from the App Store. Be sure you know your login credentials before uninstalling.

If you encounter any error codes during this process, please share them with me—I can look up specific fixes.

Does this help so far, or do you have error details you can provide? Let me know!