dd is a command line tool to do byte-exact copy.
dd-gui is a simple GUI wrapper to enable you to easily launch dd without resorting to the command line. It will also show progress information throughout the copy.
Both source and destination can be either a system device from /dev or a file with the extension .img, for example: /dev/disk4, /files/dd.img
The app has only been tested on Mac OS 10.6.x
If you choose the wrong device as the destination, you can erase important data! Proceed with caution.
2013-11-04: Added sudo to fix permissions issue on Mac OS 10.9 Mavericks (0.22)
2009-09-17: Added option to list devices (0.21)
2009-09-16: Added automatic unmounting and mounting of devices, plus more robust determination of source size (0.20)
2009-09-07: Initial release (0.10)
I may add support for all dd features, just like Air Imager on Linux.
man dd information on the dd command
dd-gui is made available under a Creative Commons Attribution-Share Alike 3.0 Unported License.