Update Procedure for Gen 2 DMC pedals / Mac OS X v10.6-up.
1. Unpack application and firmare .HEX file
2. Run updater application
3. Select .HEX file
4. Connect USB to computer and pedal while holding B1 + B2 (lower left and lower middle on DMC-6D.)
5. Select serial port, usually called /dev/cu.usbmodem-fa1321 or similar
6. Check Terminal for successful upload.