Monday, January 30, 2017

Make Bootable macOS Sierra USB Install Drive

1. Format drive with the defaults using Disk Utility and name it "Untitled".
2. Download macOS Installer App from Mac App Store (Note: If you use this installer it will not be usable again).
3. Open Terminal and run:

sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ macOS\ Sierra.app --nointeraction

4. Go do the computer you want to install Sierra on.
5. Plug in the USB drive.
6. Turn the machine on and hold down the Option (ALT) key until you get a list of drives.
7. Choose the installer, and follow the directions.

Viola!

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