I just ordered these Arduino Nanos off of Amazon(link below) and I was just trying to test them out. I plugged the Arduino into my MacBook Air, downloaded all of the software, and ran one of the example sketches that they have pre-made(it was the one that makes the built-in LED blink). When I clicked upload, it loaded but came up with an error. It said, "Problem uploading to board". I looked around the internet at tutorials and nothing helped. When I go to Tools --> Port the only thing that shows up is a Bluetooth port.
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I thought Arduino was open source.
Also, what drivers?
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