Create a bootable USB drive for macOS X El Capitan, Yosemite, Mavericks, macOS Sierra, macOS High Sierra and Mojave.

  1. Launch the Mac App Store on your Mac.
    • Launch the Mac App Store on your Mac.

    • Search for "macOS High Sierra" (or the current version of macOS, if different).

    • Click "Download."

    • If you have previously downloaded this file, you can find it in the "Purchased" tab.

    • If you're using a Windows machine, you'll need to jump through some additional hoops that are beyond the scope of this guide.

      • Search the web for a hacked macOS disc image file, or ISO. They are commonly available in the Hackintosh community.

  2. After the downloading process is complete, exit the Mac App Store. The installation window should appear momentarily.
    • After the downloading process is complete, exit the Mac App Store. The installation window should appear momentarily.

    • Click the "Install macOS High Sierra" menu at the top left of the screen, and select "Quit Install macOS."

    • Insert your USB drive into your Mac's USB port.

    • Note the name of your USB drive—it should appear on your desktop.

    • Your USB drive will be completely erased in the following steps. Make sure you have copies of any important files before you proceed.

    • Launch Terminal.

      • You can either use Spotlight Search or navigate to "Applications / Utilities" and double click the Terminal icon to launch Terminal.

    • In Terminal, type one of the following commands, depending on your version of macOS. (The name of OS, is the one you want to install on the key. Not that of your Mac's system)

    • Instead of "/Volumes/MyVolume", type the name of your USB drive. Type everything else exactly as you see it (or better yet, copy and paste it from here).

      • For El Capitan : sudo /Applications/Install\ OS\ X\ El\ --volume /Volumes/MyVolume --applicationpath /Applications/Install\ OS\ X\ El\

      • For Yosemite : sudo /Applications/Install\ OS\ X\ --volume /Volumes/MyVolume --applicationpath /Applications/Install\ OS\ X\

      • For Mavericks : sudo /Applications/Install\ OS\ X\ --volume /Volumes/MyVolume --applicationpath /Applications/Install\ OS\ X\

      • For Sierra : sudo /Applications/Install\ macOS\ --volume /Volumes/MyVolume --applicationpath /Applications/Install\ macOS\

      • The rest to the next step.

    • If you did not download the file from the Mac App Store, you must modify the file path after "applicationpath".

    • For High Sierra : sudo /Applications/Install\ macOS\ High\ --volume /Volumes/MyVolume --applicationpath /Applications/Install\ macOS\ High\

    • For Mojave : sudo /Applications/Install\ macOS\ --volume /Volumes/MyVolume --applicationpath /Applications/Install\ macOS\

    • After correctly entering the command with the name of your USB drive, press the [return] key.

    • Enter your Mac's user password.

      • Your password will not be displayed, but it is there.

    • Press [return].

    • Check the name and path of your USB key. If it looks correct, press the [Y] key, then press [return].

    • The bootable drive creation will begin. Please wait until the process completes.

    • When Terminal indicates the process is "Done," the creation of your bootable drive has succeeded.

    • To boot any Mac from your USB drive, first power it off and then press and hold the [option] or [alt] (⌥) key while turning it back on.


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Anthony Fassler

Member since: 02/26/2015

3,883 Reputation

2 Guides authored


if it is possible with power iso i have installed this one on my system.

kennieboezi - Reply

You mean create a USB key from Windows ?

Anthony Fassler -

I'm thinking of using this method to revert back to an older os due to my mac slowing down with Sierra. Will I be able to install just Yosemite or el capitan? Without installing previous os upgrades? This way I can have a fresh mac book.

skylerzanth - Reply


Yes you can but with this method, we must make a clean install.

So, please sure you save all your data to another hard drive.

Anthony Fassler -

Réparer ma clé usb

Marc Pitchebai - Reply

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