==== Driver Installation Mac OS X ==== Open up the driver dmg file {{ http://www.ladyada.net/images/arduino/driverdmg.jpg?nolink&632x354 |}} And double click on the driver package, go through all the steps necessary to install the driver {{ http://www.ladyada.net/images/arduino/driverinstall1.jpg?nolink&620x440 |}} {{ http://www.ladyada.net/images/arduino/driverreadme.jpg?nolink&620x440 |}} You will need administrative priviledges to install the software {{ http://www.ladyada.net/images/arduino/auth.jpg?nolink&433x235 |}} When it's done, restart the computer {{ http://www.ladyada.net/images/arduino/driverhd.jpg?nolink&620x440 |}} {{ http://www.ladyada.net/images/arduino/driverwarn.jpg?nolink&424x157 |}} {{ http://www.ladyada.net/images/arduino/driverrestart.jpg?nolink&620x440 |}} Once its rebooted, start up **Terminal**, located in the **Utilities** folder {{ http://www.ladyada.net/images/minipov3/findterminal.jpg?nolink&438x351 |}} Plug in the Arduino, make sure the green light is on. \\ In the **Terminal **window, type in **ls /dev/cu.*** and/or **ls /dev/tty.*** which should give the following responses {{ http://www.ladyada.net/images/arduino/lscu.jpg?nolink&503x252 |}} {{ http://www.ladyada.net/images/arduino/lstty.jpg?nolink&503x252 |}} Make sure you see a line with the text **/dev/cu.usbserial-xxxxx** where the xxx's can be anything. Same for **/dev/tty.usbserial-xxxxx**. This indicates that the driver installed properly and that the Arduino was found. If you can't find the text, verify that your Arduino is plugged in, try a different USB port. \\ You can also try running the **Console** application, which will possibly give you some information about why its failing.