Create a USB Book Drive for MacOS Sierra

  • Make sure you have 'Install macOS Sierra' in your Applications Directory.

  • Open Terminal or iTerm and run:

    sudo /Applications/Install\ macOS\ --volume /Volumes/USBDrive/ --applicationpath /Applications/Install\ macOS\

Replacing /Volumes/USBDrive/ ` with the name of your USB drive.

  • Reboot your mac while holding done the alt key, and select the 'Install macOS Sierra' drive.

Making multiple USB partitions

Load Disc Utility, resize and copy the installer files

Once you have created the correct partition you can use createinstallmedia to copy the install file onto the partiton and *make the partition bootable`

sudo /Applications/Install\ OS\ X\ --volume /Volumes/MyVolume --applicationpath /Applications/Install\ OS\ X\