Have you upgraded to macOS Mojave (10.14)? Follow these steps to allow GoToMyPC to connect to your remote host computer. Learn more.
1. In the Need Permission window, click OK. This will open the Accessibility Access (Events) window.
2. Click Open Security Preferences.
3. In the bottom-left corner, click the Lock icon.
4. Log in using your account information and select g2p_launchagenthost.
5. You have successfully authenticated GoToMyPC on your new Mac OS!