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I have been programming a Arduino Micro for weeks now, but suddenly it is not able to upload a sketch.

I am using OSX Mavericks on a Macbook Pro which has USB 3.0 ports. It has never been a problem to upload sketches, but this is the error i get:

         Programmer Type : butterfly
         Description     : Atmel AppNote AVR109 Boot Loader

Connecting to programmer: .
Found programmer: Id = "Startin"; type = a
    Software Version = N.o; Hardware Version = t. 
avrdude: error: buffered memory access not supported. Maybe it isn't
a butterfly/AVR109 but a AVR910 device?
Problem uploading to board.  See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.
share|improve this question
    
Does it show under USB in System Information? Does pressing the reset button before/at upload do anything? – Gerben Mar 6 '15 at 17:29

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