我在macOS High Sierra
第一个命令（http://macappstore.org/hiera/）
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
看起来不错
第二个命令导致错误：
brew install caskroom/cask/brew-cask
但是，据我所知，现在不需要它。
第3个命令导致错误：
brew cask install hiera
==> Satisfying dependencies
==> Downloading https://downloads.puppetlabs.com/mac/hiera-1.3.4.dmg
Already downloaded: /Users/anarinsky/Library/Caches/Homebrew/Cask/hiera--1.3.4.dmg
==> Verifying checksum for Cask hiera
==> Installing Cask hiera
==> Running installer for hiera; your password may be necessary.
==> Package installers may write to any location; options such as --
appdir are ignored.
Password:
==> installer: Package name is hiera-1.3.4
==> installer: Installing at base path /
==> installer: The install failed (The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance.)
==> Purging files for version 1.3.4 of Cask hiera
Error: Command failed to execute!
==> Failed command:
/usr/bin/sudo -E -- /usr/sbin/installer -pkg
/usr/local/Caskroom/hiera/1.3.4/hiera-1.3.4.pkg -target /
==> Standard Output of failed command:
installer: Package name is hiera-1.3.4
installer: Installing at base path /
installer: The install failed (The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance.)
==> Standard Error of failed command:
==> Exit status of failed command:
#<Process::Status: pid 10228 exit 1>
我怀疑在基地安装path / 不起作用。