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Author Topic: "Serial port '/dev/tty.usbmodem411' already in use" Mac OSX  (Read 4842 times)
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I'd also suspect that there may be some trace of the USB wifi adapter dongle around interfering with the communication with the board.   Can you try the board on another computer? 
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I have been having a similar problem with my LeafLabs Maple Rev.5 (An Arduino clone with an ARM processor) and my Mac (running the latest version of Lion). When I connect it, I am NOT prompted by System Preferences to create a new modem, causing the board not to be displayed in the list of ports. I've tried ls -l /dev/tty.usb* , but it does not return anything. This problem is rather puzzling to me.
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Just a short update....

My problem remains unsolved but I've had to put this on ice since I'm away for Christmas and couldn't take all the stuff with me. When I get back I'll try to connect the board to a different computer and see what happens. None of the other things mentioned in this thread have solved this issue for me.

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Not knowing this topic was already being explored I posted it too. I now am following along with almost identical experiences. The difference is that when I first loaded the software it worked. I then deleted that version and thinking I had not followed the download instructions carefully enough I downloaded another version which gives me the same messages as all above.
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I have been having a similar problem with my LeafLabs Maple Rev.5 (An Arduino clone with an ARM processor)
The Maple is based on Arduino (the IDE and USB to Serial connection), but far from a clone.  Your problem is that the device isn't recognized.  Not that you are getting a "Serial Port in Use" error.  Nothing about your problem with "similar" with this thread.
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