Download High Sierra from the the App Store and place a formatted USB drive named ‘Untitled’ and fire this command into the terminal. Enter your system password and let it run for several minutes.
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia —volume /Volumes/Untitled —applicationpath /Applications/Install\ macOS\ High\ Sierra.app
Tip: Press Ctrl+T to check progression.
Thanks to: Macworld
FileZilla installer error
In MacOS Sierra the installer of FileZilla installer ends in an error: Error – Could not initialize the installer.
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After downloading the app, place a formatted USB drive named ‘Untitled’ and just copy this command into the terminal and press return and your system password.
sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia −−volume /Volumes/Untitled −−applicationpath /Applications/Install\ macOS\ Sierra.app
Thanks to: macworld.com