[NODEMCU] - Install CH340 usb to serial driver on OSX Yosemeti

1. Download CH34x driver from http://www.wch.cn/downloads.php?name=pro&proid=178  http://raysfiles.com/drivers/ch341ser_mac.zip
2. Check  security and allow apps downloaded from anywhere

3. Install this driver
4. Run this command in terminal and reboot

sudo nvram boot-args="kext-dev-mode=1"

5.  Finish

Ref :
http://arduino.stackexchange.com/questions/3700/rename-device-name-ch340-usb-to-serial-mac-os
http://blog.squix.ch/2015/02/esp8266-nodemcu-dev-kit-review.html?hc_location=ufi