Записать образ на usb в Mac os

Самая полезная статья для формирования загрузочного раздела на usb через Терминал. Просто оставим это здесь как заметку.

Using Command Lines

Find Block Device

Plug-in your USB stick and find what «/dev/diskN» it is mapped to by opening Terminal (where «N» stands for «disk0», «disk1», «disk2» etc). To do so, please execute:

# diskutil list

This will print out the list of currently mapped devices/partitions. Find the USB using «NAME» column. Then note the corresponding /dev/diskN, where «N» is for index of your disk. For example:

/dev/disk2
   #:                       TYPE        NAME                    SIZE   IDENTIFIER
   0:                       FAT32                               2.0 GB   disk0
   1:                                   USB2                    2.0 GB   disk0s1

In this case «/dev/disk2» is the one we want.

Unmount USB Stick

Unmount the USB stick

# diskutil unmountDisk /dev/diskN

Where /dev/diskN is the one you have found in previous step as per our example it would be «/dev/disk2».

Write ISO to USB

Write the content of the ISO file:

# sudo dd if=/path/to/downloaded.iso of=/dev/rdiskN bs=1m

/dev/rdiskN is the same disk you have found previously, with an r in front. r is for raw disk, as writing to /dev/rdisk2 is much faster than writing to /dev/disk2. You will be prompted for the administrator’s password.