We sincerely apologize for the inconvenience you've experienced. Please visit this page for more details on when MockGo will fix the Pokémon GO 'Failed to detect location (12)' error.
As of June 7, 2024, we have released an update for MockGo Windows that supports Wi-Fi connection for iOS 17 devices. Additionally, the update for the MacOS version of MockGo, enabling Wi-Fi connection for iOS 17 devices, was released on May 17, 2024. If you encounter compatibility issues with Wi-Fi connection on iOS 17, please download the latest version of MockGo and try again.