Release Note, PL2303 Mac OS X 10.6 driver v1.4.0, Prolific Edition ============================================= Supported device ID: ==================== VID:067B PID:2303 Kernel extension filename: ==================== ProlificUsbSerial.kext Device base name: ==================== usbserial Device descriptions: ==================== USB-Serial Controller Driver version: ==================== 1.4.0 Installer filename: ==================== PL2303_1.4.0.pkg Installer script: ==================== Remove any previous installed driver first. 1. go to terminal 2. cd /system/library/Extension 3. kextunload ProlificUSBSerial.kext 4. rm -r ProlificUSBSerial.kext Installer title: ==================== Prolific USB to Serial Cable driver for Mac OS X 10.6 System Requirement: ==================== . MacOS 10.6 Snow Leopard (32 and 64 bit kernel) . USB host controller . Device using PL-2303H/X ================================================== Prolific Technology Inc. http://www.prolific.com.tw