GpsPasSion Forums – Firmware updates with Macintosh
This info has become scattered or dropped off the board, so here is a quick tutorial on how to upgrade nuvis using a Macintosh OS X computer. (The same general technique works on Windows machines.)
Here’s how I did a firmware update on my nuvi, using a G4 iMac running OS 10.3.9. Standard disclaimer: I cannot take any responsibility for the results.
Download the updater from Garmin. It’s a Windows executable (exe) self-extracting archive, but fear not. Launch Stuffit Expander and drag the exe file onto its icon. Stuffit handles it just fine – as long as you use Stuffit v10 or earlier. Stuffit v11 does not work. Ignore the extracted Windows-only programs with names like Copy2Card.exe.
Using the supplied USB cable, mount the nuvi on your desktop. If you are updating from firmware version 2.9 or earlier, be sure to make a backup copy of the waypoints.gpx file (or current.gpx under newer FW versions) in the nuvi’s Garmin folder.
As with all nuvi procedures, be sure you have a FULL backup of your nuvi before changing anything.
Use a removable SD card, not your nuvi’s internal storage, for the update procedure.
Using an SD card, either in a card reader (faster, if you have USB 2.0), or using the nuvi to access your SD card (slower), drag the Garmin folder from the extracted archive to the SD card. Be certain that you are NOT replacing the Garmin folder in your nuvi’s main directory (you will lose your maps). Unmount the nuvi and the SD card the same way you would eject any USB device from your desktop. If nuvi automatically re-mounts, use Disk Utility to un-mount it.
Turn the nuvi off and to be safe, plug it into its AC adapter. With the SD card in the nuvi’s slot, turn the nuvi back on. Be patient and do not interrupt it while it goes through the entire update process. Then copy your waypoints file (which includes “Favorites”) back into the nuvi, if necessary.
Note that the only requirement for the SD card to accomplish the update is that it have the Garmin folder on it. Existing files such as MP3s or photos do not need to be removed, as long as there’s room for the updater folder. Once the firmware is updated, you do not need the card or the updater for the GPS to work properly.
To be sure you get such extras as voices and GPS SW updates at the same time, try this method supplied by FreeBird using v3.30 as the example:
(make a backup of the changed/deleted files first).
1.) Extract from downloaded Offline Updater V3.30 the two .bin files (006B047800.bin is the GPS SW and 006B048201.bin is the TMCxx SW).
2.) Copy the two files into the Garmin directory on the NÃ¼vi (overwriting or saving the existing files).
3.) Delete the file GarminDevice.xml in the Garmin directory on the NÃ¼vi.
4.) Restart the NÃ¼vi in normal mode (not connected to the PC).