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  1. #1

    Member Since
    Feb 03, 2008
    Leeds UK
    iMac9,1 2.66 GHz Intel Core 8GB RAM; 320GB harddrive; OS X 10.9.4
    MacBook cannot read/write USB/Serial device
    I have recently bought a Garmin eTrex GPS receiver to use for geocaching.
    It has a "Memory-Map" USB to Serial cable, and a windows-only trial mapping program, which gave me enough clues too work out how to write a command line fist for windows and then for linux.
    However I wish to also do it with my MacBook ( MacOS X 10.6.2 ) - the computer I take away on holidays for photography and now geocaching.

    I have a Windows/Linux dual-booted desktop, and a Linux - Ubuntu 8.04 laptop. Both of these can read and write to the Garmin eTrex to upload or download latitude and longitude co-ordinates.
    I use the terminal program gpsbabel like this :-

    gpsbabel.exe -i geo -f geocaching.loc -o garmin -F com3: - for Windows

    gpsbabel -i geo -f geocaching.loc -o garmin -F /dev/ttyUSB0 - for Linux

    and would like to do something like this on my mac-book :-

    /sw/bin/gpsbabel -i geo -f geocaching.loc -o garmin -F /devicename

    BUT it says "cant open serial port 'devicename' "

    I found the Linux "/dev/tyUSB0" by looking in the /dev directory and seeing a few things that looked useful.
    However I can't see anything on my MacBook /dev that looks useful.

    The MacBook "System Profiler > USB Tree" correctly identifies the USB/Serial cable as long as it is plugged in, but I guess there needs to be some sort of device driver with a link in /dev.

    Can anybody help me please.

    The Geocaching website says to use on a mac one of the GUI programs -

    Garmin BaseCamp
    Garmin RoadTrip

    I have all of these working, and all give the message "no Garmin PS was found".

    GPSContact offers a choice of USB,Bluetooth-PDS-Sync,Bluetooth-Modem for the device to be written to, and there are tty.Bluetooth-PDS-Sync and tty.Bluetoth-Modem in the /dev directory.
    The other 3 have an Input and Output icon with nothing else specified.

  2. #2

    Member Since
    Jun 29, 2010
    18 sell a USB to Serial converter for my Garmin Etrex H but it doesn't detect it either!! even when one follows their guidance in relation to
    Installing a USB Serial Adapter on Mac OS X*|*Plugable

    If you wish to try it let me know if you are successful

    Regards banjo2010

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