Mac OS X Yosemite & Arduino Mount CH340 USB to serial port drive

Newly bought Arduino Development Board USB to serial port using the CH340 chip, on Mac OS X Yosemite after the normal installation of the driver, the Arduino IDE port did not find the corresponding device, using the following methods can be used after the USB to serial debugging and burning program.
1. Installing the CH340 Drive (drive: http://www.wch.cn/download/CH341SER_MAC_ZIP.html)
2. Open terminal to run the following command:
sudo nvram boot-args= "kext-dev-mode=1"
sudo Reboot

Mac OS X Yosemite & Arduino Mount CH340 USB to serial port drive