Hi there! I’m Grace. I understand that your GameChanger app won’t connect on your iMac running OS X 10.15.7. Let’s work through this together to get you back up and running.

To start, could you tell me a bit more? For example:
- Are you trying to connect through the app downloaded on your iMac, or are you using a browser?
- What exactly happens when you try to connect? Any error messages or just a failure to load?
- Have you checked if your internet connection on the iMac is working fine with other sites or apps?

Once I have that info, I’ll guide you better. Meanwhile, here are some initial steps you can try:

1. Check Internet Connection: Confirm your iMac is connected to the internet and browsing works fine elsewhere. Sometimes a slow or unstable connection affects app connectivity.

2. Restart the App: Quit the GameChanger app completely and restart it.

3. Sign out and Sign Back In: If possible, log out of your GameChanger account in the app, then log back in to refresh your session.

4. Restart Your iMac: A simple reboot can clear up network glitches or app conflicts.

5. Check for Updates: Ensure your GameChanger app is up to date. Since your OS X is 10.15.7, compatibility should generally be fine. Also check for any macOS updates you might have missed.

6. Verify Firewall Settings: Sometimes the macOS firewall or security software blocks app connections. You can check this in System Preferences > Security & Privacy > Firewall. Try temporarily disabling it to test if that helps.

7. Network Settings: If you are behind a corporate or school network, some ports may be blocked. Try connecting using a different Wi-Fi or your phone’s hotspot.

If you have already tried any of these, please let me know which, and if there was any change.

If none of these solve it, I can help you dig deeper into specific network settings, clear app caches, or check for server issues on our end.

Does this sound good? And do you have any more details you can share about the issue?