##Create a bootable USB stick on OS X
Convert the .iso file to .img using hdiutil
Note: OS X tends to put the .dmg ending on the output file automatically.
$ hdiutil convert -format UDRW -o target.img source.iso
Reading Master Boot Record (MBR : 0)…
Reading Ubuntu 13.10 i386 (Apple_ISO : 1)…
Reading (Windows_NTFS_Hidden : 2)…
................................................................................................................................................................................
Elapsed Time: 8.877s
Speed: 100.8Mbytes/sec
Savings: 0.0%
created: target.img.dmg
Run diskutil again and determine the device node assigned to your flash media (e.g. /dev/disk2).
$ diskutil list
…
/dev/disk2
#: TYPE NAME SIZE IDENTIFIER
0: FDisk_partition_scheme *8.0 GB disk2
1: DOS_FAT_32 UNTITLED 1 8.0 GB disk2s1
Unmount
$ diskutil unmountDisk /dev/disk2
Unmount of all volumes on disk2 was successful
Use dd to copy over the image.
- Using /dev/rdisk instead of /dev/disk may be faster
- 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
$ sudo dd if=target.img.dmg of=/dev/rdisk2 bs=1m
895+0 records in
895+0 records out
938475520 bytes transferred in 221.171442 secs (4243204 bytes/sec)
Modified via: http://www.ubuntu.com/download/desktop/create-a-usb-stick-on-mac-osx