- Open a Terminal (under Utilities)
- Convert the ISO to UDRW format
hdiutil convert -format UDRW -o destination_file.img source_file.iso
- Run
diskutil list and determine the device node assigned to your flash media (e.g., /dev/disk2)
- Run
diskutil unmountDisk /dev/diskN (replace N with the disk number from the last command; in the previous example, N would be 2)
- Execute
sudo dd if=/path/to/destination_file.img.dmg of=/dev/diskN bs=1m (replace /path/to/destination_file.img.dmg with the path where the image file is located; for example, ./win7.img.dmg)
- Using /dev/rdisk instead of /dev/disk will faster, 20x
- If you see the error dd: Invalid number '1m', you are using GNU dd. Use the same command but replace bs=1m with bs=1M
- If you see the error dd: /dev/diskN: Resource busy, make sure the disk is not in use. Start the 'Disk Utility.app' and unmount (don't eject) the drive
- Run
diskutil eject /dev/diskN, and remove your flash media when the command completes (this can take a few hours on slower drives)
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