The BU-353 GPS connected to the MacBook via USB
You have to follow the steps below, in order :
1) Quit GPSNavX or MacENC before proceed.
2) Install the Prolific PL2303 driver.
http://www.francis-fustier.fr/media/Telecharge/PL2303_1.2.1.sit
3) Connect the BU-353 USB GPS antenna to a USB port on your Mac.
4) Launch GPSNavX or MacENC, select the menu "GPS > Connect ". Open the "Settings" drawer, then select :
– Type : "SiRF USB"
– Port : "usbserial"
– Rate : " 4800 ”