I recently bought an arduino uno and when I plugged it into my computer, both the on LED and the L LED turned on. I am using mac os x version 10.7.5. My computer doesn't recognize the arduino as a modem and i get no notifications when I plug it in . Nothing happens when I press reset, either. When I…

programmer is not responding arduino uno Mac OS X

cmiyc July 26, 2014, 4:14am 2

 /dev/tty.usbmodem621

Looks right.

Which Arduino are you using?

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