How did you install the map files onto your PC for Mapsource to use? There is no need to have a device connected assuming you have installed the maps correctly.

Caracteristicas De Windows Server 2003 Standard Edition. My older Nuvi does not have enough storage space for the 2012 maps, so I had to install part of it to the Nuvi's ROM and part to a card. The instructions are scattered all over the Garmin website and forums and are not accompanied by Mac-friendly images. Oftentimes the Mac directions are awkwardly tacked on to Windows directions or refer to menus and controls that don't exist on the Mac versions of their software. This is what I did (March 2012) to accomplish the installations on (Intel) Mac OS 10.5.8 1. Get from Garmin, using and as starting points: map, map updating software (Lifetime Map Updater or WebUpdater), MapInstall and MapManager. In my case, I have a nuMaps lifetime subscription and was directed by the Garmin site to try Lifetime Map Updater (LMU) for the first time.

The Garmin LMU directions are actually pretty bad, but LMU doesn't have that many controls (see image at right), so I didn't have that much difficulty downloading maps for two devices and my computer. I liked the LMU interface better than the WebUpdater interface I'd used previously, b/c it's easier to tell how the download is going, but LMU has been panned by many folks at GpsPasSion, so YMMV. As with prior Garmin map downloads, I had to quit and restart LMU multiple times to complete the download, which stalled repeatedly. If you don't want to use LMU to d/l the updates, you'll need WebUpdater. Lifetime Map Updater controls (Click on any image in this tutorial to enlarge it in a new window) (Every step has an image; if you don't see an image, refresh the page) 2. Get maps with LMU (or WebUpdater) Set the LMU preferences to install the maps both to 'my device' and 'my Mac' and follow LMU directions to download the maps. Selecting the computer as a destination is essential if you are installing the map to multiple devices or if you need to put a partial map on the device ROM and a complete map on the card, or are planning to use Base Camp, POI Loader or MapInstall.

I followed the LMU on-screen prompts to update my first device, a Nuvi 360. Power Geez Amharic Software. The download stalled several times, but once the update downloaded, updating the 360 went off without a hitch, although it took an extra hour after the download completed. Next step was to update my second device, a Nuvi 650 whose physical capacity is smaller than the complete 2012 map. I decided to install the complete map to the card first.