Problem: When trying to upload a sketch via the USB Programming Port the following error message appears:
No device found on /dev/tty.usbmodem1421
However, when I connect the Arduino via the Native USB Port the sketch is uploaded and runs just fine.
To my understanding, I have selected the Board and the Port correctly each time.
I am using an Arduino Due, Arduino IDE 1.5.4 and Mac OS 10.9 (Mavericks).
The same problem has been described by "aude" here:http://forum.arduino.cc//index.php?topic=148613.msg1442629#msg1442629
In his case the problem was solved setting the Baud rate manually.
Would the problem in my case also be the Baud rate? If yes, how do I change it on a Mac?
Is that an Arduino IDE software bug or is it meant to be that way?
I would be very happy about any help.