Warning: You have external commands with conflicting names. Found command `brew-cask` in following places: /usr/local/bin/brew-cask /usr/local/Library/Taps/caskroom/homebrew-cask/cmd/brew-cask.rb 調べてみると、どうやらHomebrew-CaskはHomwbrewに一体化された模様 https://github.com/caskroom/homebrew-cask の冒頭から引用 Homebrew-Cask Important December update: Homebrew-Cask will now be kept up to date together with Homebrew (see