Installing Arduino

Visit arduino.cc to download the latest version of Arduino

Click on the Mac OS X Installer link to download the installer

Then double click to expand/launch it

it will automatically give you the Arduino app the teal icon:

Install Drivers (if not using Arduino UNO)

If you have an official Arduino UNO you won't need to install any other software. However, if you have an Arduino compatible with a CP210x or FTDI USB to serial converter, you may need to install a driver.

You can download the latest CP210x driver here and the latest FTDI driver here

Installing SiLabs CP210x Drivers

Installing FTDI Drivers

Find your Serial Port Device

You can use Terminal to help find and verify your Arduino. First, launch the Terminal app - you can Command-F to Find the Terminal.app program:

Double click to launch it. At the text prompt, type in ls /dev/cu* (note the first letter is a lower-case L)

Make sure you see a line with the text /dev/cu.usbmodemxxxx or /dev/cu.usbserial-xxxxx where the xxx's can be anything. This indicates that the driver installed properly and that the Arduino was found.

You can close the Terminal program now