To do garmin map update. Complete the required fields to set up an account. Sign in if you have an account already. Connect your Garmin GPS to it. Pick Add a device from the menu & select your device from the list. Take the GPS out of the car, switch it on, and plug it into your computer's USB port.
You'll be brought to the dashboard as soon as the connection is made. If the dashboard won't launch, login to your account manually. Choose from the Windows and Mac download options. Run the downloaded file and adhere to the prompts on the screen to finish.

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garmin map update