Arduino Issue: avrdude: Error: Could not find USBtiny device

OS: iMac OS X El Capitan
We are new to Arduino, and were trying to upload our code to our project - Jewelbots Intro to Wearables featuring the Arduino Gemma - (all of the code was checked and correct, by the way), but this showed up:
In file included from /Users/Evie/Downloads/Arduino.app/Contents/Java/hardware/arduino/avr/cores/arduino/Stream.h:26:0,
from /Users/Evie/Downloads/Arduino.app/Contents/Java/hardware/arduino/avr/cores/arduino/HardwareSerial.h:29,
from /Users/Evie/Downloads/Arduino.app/Contents/Java/hardware/arduino/avr/cores/arduino/Arduino.h:224,
from sketch/Intro_to_Wearables_6_26_2016.ino.cpp:1:
/Users/Evie/Downloads/Arduino.app/Contents/Java/hardware/arduino/avr/cores/arduino/Print.h:32:0: warning: “BIN” redefined [enabled by default]
#define BIN 2
^
In file included from /Users/Evie/Downloads/Arduino.app/Contents/Java/hardware/tools/avr/avr/include/avr/iotn85.h:38:0,
from /Users/Evie/Downloads/Arduino.app/Contents/Java/hardware/tools/avr/avr/include/avr/io.h:428,
from /Users/Evie/Downloads/Arduino.app/Contents/Java/hardware/tools/avr/avr/include/avr/pgmspace.h:88,
from /Users/Evie/Downloads/Arduino.app/Contents/Java/hardware/arduino/avr/cores/arduino/Arduino.h:28,
from sketch/Intro_to_Wearables_6_26_2016.ino.cpp:1:
/Users/Evie/Downloads/Arduino.app/Contents/Java/hardware/tools/avr/avr/include/avr/iotnx5.h:55:0: note: this is the location of the previous definition
#define BIN 7

^

Sketch uses 848 bytes (15%) of program storage space. Maximum is 5,310 bytes.
Global variables use 9 bytes of dynamic memory.
avrdude: Error: Could not find USBtiny device (0x2341/0xc9f

We tried all of the tips on the troubleshooting page, but none of it helped past this point.
Please help!!! :o

P.S. We tried to attach a photo of our project, but just in case it does not show up …

  • The Arduino Gemma is sewn onto fabric
  • It is plugged into our computer, connected by tiny led-USB cord
    -There is a green light on the Gemma

We know this forum is not for the project itself, but thought that a picture/description would be helpful anyways :).

Do you have the correct port selected in the Tools > Port menu? try this:

  • With the Arduino board unplugged from the USB open Tools > Port and note the listed ports.
  • Close the Tools > Port menu.
  • Plug in the USB cable on the Arduino board
  • Wait a bit for the Arduino board to connect
  • Open Tools > Port, the new port on the list is your Gemma.