I have been unable to update the maps on my 3590LMT for over a year now.
I tried Customer Support last year by email and after about 10 mails back and forth over a period of 3 months and at least 3 different Technicians I gave up!!!
After reading through this forum I'm starting to wonder whether it's the combination of Garmin Express and my Macbook Air.
Can anyone shed any light on this problem as I'm just off to Spain and Portugal so would like my maps up to date?
Richard