OK, I really can't get it to work - I'm doing it in the order most howtos seem to suggest - i.e. to run the flasher, then plug in the 770...

users-Computer:~/Maemo tools user$ ./flasher.macosx --enable-rd-mode
Suitable USB device not found, waiting
^C
users-Computer:~/Maemo tools user$ sudo ./flasher.macosx --enable-rd-mode
Password:
Suitable USB device not found, waiting

...but as you can see, it just sits there waiting

Am I missing a trick here? Is there something you need to do to get the Mac command line/terminal app to 'see' the USB connection?