Importing maps to BaseCamp Mac

Hi, after many tries this is what worked for me: download maps from: http://garmin.openstreetmap.nl/ open terminal on mac and type:

cd ~/Downloads
unzip <downloaded_map>.zip
cd /Applications/Garmin\\ BaseCamp.app/Contents/Resources
sudo mv ~/Downloads/<downloaded_map>.gmap .

the last command end with dot (means current directory) and will prompt for password. Now you can open basecamp with the map selected. If it is not selected, then you can pick it from the Maps menu.

The solution to rename the file extension to .gmapi didn't work for me either so here's what did:

1. download and extract the "osm_generic_macosx.zip" file
2. download and install Garmin MapManager here: https://www8.garmin.com/support/download_details.jsp?id=3825
3. open MapManager and select "File/Install Map..." and open the unzipped map file (*.gmap)
4. open BaseCamp and select "Maps/OSM generic routable"

You need to download the "osm generic macosx.zip" and this will extract to the file "OSM generic routable(THA_19-01-2015).gmap" and that when double-clicked will install on the mac using Garmin MapManager.app I think and Basecamp on the Mac will load it fine. It worked for me ok.
You may have downloaded the Windows or Linux file by mistake or got amongst the "Nullsoft Scriptable Installer script used to create the BaseCamp/MapSource installer." which is probably a Windows thing?

I finally found a solution. Actually still cannot import directly in basecamp as i used to but......!!!!!! After about a year of no more new OSM maps on my basecamp (mac osx el capitan), I just installed a new map for the first time again. :-) the solution for me is: don't import into basecamp (I stopped trying, none of the above helped me and couldn't find a solution). Instead: paste the map directly into the gps, then connect the gps to the computer and basecamp imports the map from the gps.

Hope this helps anyone who still struggles.

Sten

I know the original question is quite old but I'll update my working solution here just in case someone came across the question like me.

MacOS Mojave 10.14.2 Basecamp 10.4.0

1. Grab your map from http://garmin.openstreetmap.nl/ - I downloaded the "osm_generic_new_macosx.zip"
2. Unzip the file. You should get a folder "OSM generic routable new <something>.gmap"
3. Use Finder to locate your Application folder.
4. Hold Ctrl- click on the Basecamp app icon. Select "Show Package Contents"
5. "Contents" folder should show up. Select it and you will find a whole lot of files and folders.
6. Drag your "OSM generic routable new <something>.gmap" into "Resources" folder.
7. Start (or Restart) your Basecamp and your OSM map should show up.

Hope this helps!

You are absolutely right Natee T!!!!!!!!! After a lot of trying this method works just like this!!!!! GREAT!!!!!!! Thank you!!!!!!!!!!!!

the answer is simple:

add the .gmap fil to the resources folder in the basecamp app. It is what the code shared in this thhread does.

1. Close basecamp
2. go to applications.
3. right click on basecamp
4. select show package contents
5. navigate to the resources folder
6. Paste the .gmap folder in there
7. launch basecamp
8. profit