Ted I struggled with trying to get dfu-util to see my device even though it installed the device drivers. I couldn¡¯t get it to work on a mac but was able to on windows 7 (should also work on 10) using the Zadig utility to install additional drivers needed. Check out this write up. Note: I still can¡¯t access terminal mode to run a ¡°clearconfig¡±. I have the gecko classic.
