install brew cask

os x install brew cask '/usr/../../brew-cask.rb' does not exist

brew 已安装完毕，安装brew cask

brew install caskroom/cask/brew-cask

error

==> brew cask install caskroom/cask/brew-cask
Error: '/usr/local/Library/Taps/caskroom/homebrew-cask/Casks/brew-cask.rb' does not exist.
Error: nothing to install

another try

brew install brew-cask

info

Error: No available formula with the name "brew-cask" 
==> Searching for a previously deleted formula...
Error: No previously deleted formula found.
==> Searching for similarly named formulae...
This similarly named formula was found:
brew-cask-completion
To install it, run:
  brew install brew-cask-completion
==> Searching taps...
Error: No formulae found in taps.

最终使用推荐的方法

brew install brew-cask-completion

赶快尝试下

➜  ~ brew cask search qq
==> Exact Match
qq
==> Partial Matches
qqbrowser           qqinput             qqmacmgr            qqmusic