Terento

Mac installation guide

Install third-party maps on your Garmin watch in three simple steps

Connect your watch, choose a map, and let Terento handle the installation — without manual file transfers.

macOS 13+Apple SiliconMap-capable Garmin watch

A quick check

Before you start

  • Apple Silicon Mac
  • macOS 13 or later
  • Garmin smartwatch with map support
  • USB cable that supports data transfer

The Compatibility page shows exact Garmin models and variants with at least one successful shared installation. The list grows as more successful installations are shared. A missing model does not mean it is unsupported; it may simply not have a successful shared installation for that exact model and variant yet. Terento is intended for Garmin smartwatches with map support. After connection, Terento checks the detected device and tells you whether installation can safely continue.

See current compatibility evidence

The workflow

Install in three steps

  1. Connect

    Connect your watch with a USB data cable. Terento recognizes it and checks whether you can continue safely.

    Garmin watch not showing up on Mac
    Terento showing a connected Garmin watch and device detection status
    Terento recognizes the connected Garmin watch before installation.

  2. Install

    Choose a map from the catalog or upload your own compatible .img file. Terento handles the installation for you.

    1. Choose from the catalog

      Choose a region from one of the four map providers in the catalog.

    2. Upload your own map

      Add a compatible .img map from your Mac.

    Terento showing third-party map providers, regions and available Garmin storage
    Choose a map from the catalog or add your own compatible file.

  3. Done

    When Terento confirms the installation is complete, safely disconnect the watch and check that the map is available.

    Terento showing a completed map installation on a Garmin watch
    Keep the watch connected until transfer and verification are complete.

Need a hand?

If something does not work

Terento does not detect the watch

Wait up to 1–2 minutes after connecting. If the watch still does not appear, reconnect it, check that the cable supports data and close other apps that may be using it. More help: Garmin watch not showing up on Mac, Garmin Express or another app is using the watch, Garmin watch not recognized: USB mode (MTP).

Install or Update is unavailable

Temporarily unavailable maps stay visible. Read the reason shown beside the map. If its provider is unavailable or downloads are paused, try later. If Terento cannot check current availability, check your internet connection and try again. Your installed maps remain available. More help: Garmin map list won’t load or Terento needs an update, Garmin map download failed.

Installation failed

On the failed installation screen, choose “Report issue”. Terento opens GitHub with the report already filled in. Review it before posting: GitHub issues are public. For help by email, include your watch model, map region and what happened. More help: Map installation failed: leftover map on the watch, How to report a problem with Terento.

The map was installed but is not visible

Reconnect or restart the watch and check its map settings. If the map still does not appear, email support with your exact watch model, map region, and what happened. hello@terento.app

See all troubleshooting steps

Ready when you are

Ready to install your first map?

Download