I picked up a DVD version of City Navigator North America NT a few days ago with the intention of installing and then getting lifetime updates for my Garmin Montana 680t. It was a lark, but I like the maps and this seemed like a way to get updatable CN maps just like I have on my Nuvi LM.
I inserted it into my MacBook and attempted to install the CNNANT 2010 pkg. I would get all the way through the install screens, but at the last it gives me an error saying there is no software to install. Nothing seems to be able to extract any map data.
I am running Basecamp 4.6.3. Somehow I imagined it would go there, then I could send it to my Montana. Obviously, I am missing something. I thought I'd give this forum a try before giving the process up.