When I connect my Nüvi 3790 LMT to my Mac (MacOS Sierra), it is firstly detected by Garmin Express (4.1.30).
Then I see that I can install the 2017.10 version of the map.
When I launch that... the response is that I've not enough memory on the Garmin (I've a 8Gb micro SD into it).
What should I do to solve this?
After this negative feedback, the connection to my garmin is lost.
Thx for your help.