When I try to run it with the Arduino plugged in and set to DFU mode I see this:
Adam-Rolphs-iMac-3:~ adamrolph$ /Users/adamrolph/Downloads/dfu-programmer atmega16u2 reset
dyld: Library not loaded: /usr/local/lib/libusb-1.0.0.dylib
Referenced from: /Users/adamrolph/Downloads/dfu-programmer
Reason: image not found
Trace/BPT trap: 5
I'm sorry that my knowledge of the terminal is so limited.. I have learned how to use IDE's at my school but I have never done this before and I am having a lot of trouble. Your help is very appreciated thank you