How to easily make a USB installer for Mavericks / Yosemite / El Capitan & macOS Sierra
There's been a plethora of sites running instructions on how to make a bootable USB (or HD) installer. All of them have the same basic instructions. And all of them have chosen the difficult way - making all files visible, dragging items to the desktop, etc.
None of this is required. The following is the easy way of creating a bootable copy of the installer.
Firstly, make sure there's a copy of Install macOS Sierra sitting in your Applications folder. Grab an 8GB flash drive and make sure it's partitioned as GUID and formated as Mac OS Extended (Journaled). Call it Untitled (for example).
Next, simply open a terminal and paste relevant command from the following (followed by enter) ..
sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ macOS\ Sierra.app --nointeraction
sudo /Applications/Install\ OS\ X\ Mavericks.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ OS\ X\ Mavericks.app --nointeraction
sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ OS\ X\ Yosemite.app --nointeraction
sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/ElCapInstaller --applicationpath /Applications/Install\ OS\ X\ El\Capitan.app --nointeraction
The installation also looks as though it's stalled on 2 minutes. Don't panic - the install can take up to an hour.