Howto: create bootable USB stick on Mac OS X

How-to-create-bootable-USB-stick-on-OSX

How-To: create bootable USB-stick from ISO image:
=================================================


1. Download ISO image file:
   wget -o ~/Desktop/mini.iso http://ftp.nl.debian.org/debian/dists/wheezy/main/installer-amd64/current/images/netboot/mini.iso


2. Convert ISO file to DMG format using hdiutil:
   hdiutil convert -format UDRW -o Desktop/mini.img Desktop/mini.iso

Output should look as follows:

Reading Master Boot Record (MBR : 0)…
Reading ISOIMAGE                         (Apple_ISO : 1)…
...................................................................................
Reading  (Apple_Free : 2)…
Reading  (DOS_FAT_12 : 3)…
...................................................................................
Elapsed Time:  46.475ms
Speed: 494.9Mbytes/sec
Savings: 0.0%
created: /Users/armin/Desktop/mini.img.dmg


3. Determine what disk-Device our USB stick is using diskutil:
   diskutil list

Output should look as follows:

/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *251.0 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                  Apple_HFS Macintosh HD            250.1 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *4.1 GB     disk1
   1:                 DOS_FAT_32 NO NAME                 4.1 GB     disk1s1

4. Unmount USB stick using unmountDisk:
   diskutil unmountDisk /dev/disk1

Output should look as follows:

Unmount of all volumes on disk1 was successful

5. Use dd to transfer the DMG image to the USB stick:
   sudo dd if=Desktop/mini.img.dmg of=/dev/disk1 bs=1m

Output should look as follows:

Password:
23+0 records in
23+0 records out
24117248 bytes transferred in 28.726522 secs (839546 bytes/sec)

6. Eject USB disk drive using diskutil:
   diskutil eject /dev/disk1

Output should look as follows:

Disk /dev/disk1 ejected

7. Happy installing!