Create a bootable USB flash media drive from Mac OSX



 

First download your desired .img / iso file to be written on the drive.

Open a Terminal (under Utilities)

Run the following command to get the current list of devices

diskutil list

Insert your flash media

Run the diskutil list again and determine the device node assigned to your flash media (e.g. /dev/disk2)

Run

diskutil unmountDisk /dev/diskN

then execute

sudo dd if=/path/to/downloaded.img of=/dev/diskN bs=1m

finally run

diskutil eject /dev/diskN

and remove your flash media when the command completes.