OK. I have tried to uploading the example Blink sketch to my new Due, using 4 different approaches, using 3 different computers, and they all involve a port problem. Each time, Arduino 1.8.5 and SAM Boards 1.6.11 was installed, and the "Arduino Due (Programming Port)" option was selected. Also, I had recently SUCCESSFULLY performed a clean OS install on each of the three computers, so I doubt that software on all three computers is defective. All other applications work fine on those computers.
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Mac laptop running OSX 10.13.
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Mac desktop running OSX 10.10.5.
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Second Mac laptop running OSX 10.10.5.
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Windows 10 virtual machine on the Mac laptop running OSX 10.13, and using VMWare 8.5 for the virtual machine.
Since the problem happens in all four approaches, is this a problem with the actual, physical Due board? Will Arduino send me a replacement Due?
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