How to burn an ISO to a USB stick

Here is how to write a ISO file to a USB stick so you can boot from it.
  1. Run the diskutil command to get a list of disk. Be very careful to make sure you select the correct disk. Here its easy its the only one that is 8.0GB in size. NOTE: I have removed the others disks from the list to make the post shorter.
malcolms-macbook-pro:~ malcolm$ diskutil list /dev/disk3 (external, physical): #: TYPE NAME SIZE IDENTIFIER 0: FDisk_partition_scheme *8.0 GB disk3 1: Windows_NTFS Untitled 8.0 GB disk3s1 2. Next, you need to unmount the disk malcolms-macbook-pro:~ malcolm$ sudo diskutil unmountDisk /dev/disk3 Volume Untitled on disk3 unmounted 3. Then, find the ISO file. malcolms-macbook-pro:~ malcolm$ cd Downloads/ malcolms-macbook-pro:Downloads malcolm$ ls -l total 5408568 -rw-r--r--@ 1 malcolm staff 601817088 21 Jun 17:51 FreeBSD-11.0-RELEASE-i386-disc1.iso -rwx------@ 1 malcolm staff 643112960 17 Jun 18:37 FreeBSD-11.0-RELEASE-i386-memstick.img -rw-r--r--@ 1 malcolm staff 575899648 21 Jun 17:07 FreeNAS-11.0-RELEASE.iso -rwx------@ 1 malcolm staff 539889664 4 May 18:27 FreeNAS-9.10.2-U3.iso 4. Then write the ISO file to the USB "disk" using the DD command. Again, make double sure you are using the correct disk. I have used disk 3 here, your's may be different. Also, note the addition r in the disk name, its not required, but does make it faster. malcolms-macbook-pro:Downloads malcolm$ sudo dd if=FreeNAS-11.0-RELEASE.iso of=/dev/rdisk3 bs=1m 549+1 records in 549+1 records out 575899648 bytes transferred in 69.073390 secs (8337504 bytes/sec) 5. Next eject the disk. malcolms-macbook-pro:Downloads malcolm$ diskutil eject /dev/disk3 Disk /dev/disk3 ejected malcolms-macbook-pro:Downloads malcolm$ 6. All Done.

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