Garmin MapSource is not available for Mac but there are some alternatives that runs on macOS with similar functionality. The best Mac alternative is QMapShack, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to Garmin MapSource and six of them are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to Garmin MapSource are Garmin BaseCamp (Free), QLandkarte GT (Free, Open Source), RouteConverter (Free, Open Source) and Viking GPS data editor and analyzer (Free, Open Source).
Use QMapShack to plan your next outdoor trip or to visualize and archive all the GPS recordings of your past exciting adventures. QMapShack is the next generation of the famous QLandkarte GT application. And of course it's even better and easier to use.
Garmin® BaseCamp® provides an interface for viewing Garmin map products and managing geographic data. With BaseCamp, you can perform the following tasks: • Transfer data to and from your Garmin device.
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Most users think Garmin BaseCamp is a great alternative to Garmin MapSource.
Viking is a free/open source program to manage GPS data. You can import, plot and create tracks, routes and waypoints, show OSM, Terraserver, Bing Aerial and other maps, geotag images, see real-time GPS position, get geocaches, control items, etc.