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.