I down a file us_p_nw.gmapi from here. I got it to Mapinstall okay, but the send map button is not activated, so I can't click on it to send the map to my Oregon 450. It is a brand new device with no maps on it yet except what comes with it out of the box. I also have a 4GB SD micro card on it. I have a Mac with OS 10.6.8 and the latest version of Macinstall, Basecamp, and MapManager downloaded from the Garmin website. So what am I missing?
Do you mean MapInstall? You need to select some or all of the mapset to have the send button work.
give this a look: http://www.youtube.com/watch?v=ftxwadXEQXo
Thank you. The tutorial helped.