I have "Install OS X El Capitan.iso" file. I have burned the image to a DVD and successfully installed El Capitan in the past. Now that my DVD drive is broken, I would like to create a bootable USB Drive out of it. Can this be achieved? If yes, I'd like to know how.

  • Answer to your questions: Yes. I assume you would like to know how this works? Then check support.apple.com/en-us/HT201372 or just google create bootable usb drive from .iso mac. You will find many examples since there are multiple ways to achieve it, for basically all OS versions.
    – X_841
    Commented Feb 6, 2020 at 11:49
  • Does this answer your question? How do I make a bootable USB flash drive on a Mac?
    – X_841
    Commented Feb 6, 2020 at 12:24
  • Where did this 'iso' come from? That's not a format that Apple distributes OS installers in, as far as I know. MacOS installers usually come as .app, .pkg, or .dmg.
    – benwiggy
    Commented Feb 6, 2020 at 13:11
  • Yes I am wondering the same thing. Sounds like he downloaded a torrent file or something. Pretty dangerous if you ask me.
    – DanRan
    Commented Feb 7, 2020 at 0:14

1 Answer 1


All I did was wrote the image to USB Drive with dd command from the terminal and it booted like a charm. The command I used was:

$ diskutil list
$ cd /path/to/Install_OS_X_10.11_El_Capitan.iso
$ sudo dd if=Install_OS_X_10.11_El_Capitan.iso of=/dev/disk2 bs=1m

Replace disk2 with the appropriate drive listed in the output of the first command. For example, disk3 or disk4.

  • Please at least modify your question. You are asking if it is possible, not how. Also, this may be a duplicate question/answer and the answer is not very precise: Explain the steps you did and make them as clear as possible. Take a look here: stackoverflow.com/help/how-to-answer
    – X_841
    Commented Feb 6, 2020 at 12:28
  • Please share the complete dd command line.
    – lhf
    Commented Feb 6, 2020 at 12:28

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