Aloha!
I few days ago I got my new, shiny Due (wohoo). However I'm having problems uploading sketches using the Arduino development environment to the Due.
When I connect the board using USB-cable the HW Growler (http://growl.info/documentation/hardwaregrowler.php) shows that the "Arduino Due Prog. Port" has been connected, so it seems that the board is recognized by the system. Also, when the board is connected, /dev is populated with a tty.usbmodem1421 device.
I've downloaded the beta version of the Arduino development environment (version 1.5.1) and I can select Arduino Due (Programming Port). I can also select the tty.usbmodem1421. There is also a cu.usbmodem1421 port that I can select. But no matter what port I select, I get "No device found on tty.usbmodem1421" when trying to upload a sketch.
My machine is a mid 2012, Ivy Bridge Air running 10.8.2.
Any suggestions, pointers and help solving this problem greatly appreciated.