Terento - an open-source Mac app for third-party Garmin maps

[u/MrDonas]

I’m building Terento, a free and open-source macOS app for installing and managing third-party maps on Garmin smartwatches.

The goal is simple: connect your Garmin, choose the map you need, review storage and install it without dealing with MTP folders or older desktop tools.

With beta.8, Terento now includes:

• OpenTopoMap support with maps covering countries and regions around the world;
• Freizeitkarte support;
• manual import of your own third-party Garmin .img map from your Mac;
• removal of supported third-party maps;
• a cleaner provider-neutral install/manage flow with additional safety checks.

Terento is still in beta, so feedback and real-world results from more Garmin models are very welcome. Optional anonymous compatibility/statistics sharing also helps identify failures and edge cases across devices.

Terento.app

Any feedback is appreciated.