Making my dumb Microsoft Streets and Trips GPS work on my Mac
1) Download Prolific PL2303 Driver for Mac OS X. Install.2) Edit /System/Library/Extensions/ProlificUsbSerial.kext/Contents/Info.plist
Change idProduct and idVendor numbers to match those you get from the Apple System Profiler. Use the decimal values, not the hex ones.3) Reboot. /dev/tty.usbserial should exist now.Similar instructions at: http://www.osxhax.com/archives/000006.html
