Getting Up and Blinking with the Arduino - Exploring Arduino: Tools and Techniques for Engineering Wizardry - page 14

RunningtheIDEandConnectingtotheArduino
Now that you have the IDE downloaded and ready to run, you can connect the
Arduino to your computer via USB, as shown in Figure 1-12. Mac and Linux
machines install the drivers (mostly) automatically.
If you are using OS X, the first time you plug in an Uno or a Mega 2560, you
will get a notification that a new network device has been added. Click the
Network Preferences button. In the new window, click Apply. Even though the
board will appear as “Not Configured” in the network device list, it will be
ready to use. Now, quit System Preferences.
If you are using a modern Arduino on a Windows computer, you will prob-
ably need to install drivers. You can skip the following directions if you are not
using a Windows computer that needs to have drivers installed. If you installed
the IDE using the Windows installer, then these steps have been completed for
you. If you downloaded the ZIP on your Windows machine, then you will need
to follow the directions shown next.
Figure 1-12: Arduino Uno connected to a computer via USB