Hi there! I understand you're having trouble signing in to the MyGEHA app on your Mac, and you're seeing the message "Something went wrong. Please try again." Let's work through this together.

First, just to get a better idea:

1. Are you trying to sign in through a web browser on your Mac, or are you using a dedicated app?

2. Have you recently changed your password or any account information?

3. Have you tried signing in on a different device or browser to see if the issue persists?

4. Are you connected to the internet without any interruptions?

These details will help me tailor the solution for you. Meanwhile, here are some steps you can try on your Mac:

1. Refresh the page or restart the app and try signing in again.

2. Clear your browser's cache and cookies if you're using a browser. On Safari: Go to Safari > Preferences > Privacy > Manage Website Data > Remove All.

3. Ensure your macOS (10.15.7) and browser are updated to the latest versions.

4. Try signing in using a different browser such as Chrome or Firefox if Safari is giving issues.

5. Temporarily disable any VPN or firewall software that might be interfering.

Let me know what you find out from these steps and your answers to my questions, so I can assist you further!