I was programming my TinyShield and it was working pretty well. Sometimes the output to the serial monitor was garbled, not sure why. I clicked the upload button to upload a new sketch, and that action made my iMac reboot. After that, in the Arduino IDE, there was no USB port for the TinyShield. I think my USB shield just died
![Sad :(](https://forum.tinycircuits.com/Smileys/default/sad.gif)