As c0nb0x is being rewritten from the ground up and there's no ETA, I mailed this working version to many people in the past:
It works fine, but was never officially released. Requirements:
- XQuartz: https://www.xquartz.org
- FTDI VCP usb serial driver: http://www.ftdichip.com/Drivers/VCP.htm
Keep in mind: this version can not be used to update the x0xlarge CPU.
For updating a x0xlarge use avrdude or plain midi (via Elektron C6 or similar).
Editing/backing up patterns works fine though. And updating the firmware of a regular x0x CPU.
For full info on c0nb0x see http://antonsavov.net/cms/projects/c0nb0x.html