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Amazon.com: TRENDnet USB to Serial 9-Pin Converter Cable, Connect a RS-232 Serial Device to a USB 2.0 Port, Supports Windows & Mac, USB 1.1, USB 2.0, USB 3.0, 21 Inch Cable Length,
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macos - Mac OS X Mountain Lion doesn't recognize devices plugged into USB serial ports - Stack Overflow
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Using iMac, problem with PORT selection when trying to uploading sketch to board - Installation & Troubleshooting - Arduino Forum
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