OSX Usb Serial Driver

[yehlu]

http://www.ftdichip.com/Drivers/VCP.htm

If you're using an older board (Duemilanove, Diecimila, or any board with an FTDI driver chip that looks like this:


you will need to install the drivers for the FTDI chip on the board. You need to download the latest version of the drivers from the FTDI website. One downloaded, double click the package, and follow the instructions in the installer. You'll need to restart your computer after installing the drivers.