```bash
// Install brew-cask
brew install caskroom/cask/brew-cask

// Install alternate versions tap
brew tap caskroom/versions

// Install necessary apps
brew cask install google-chrome
brew cask install google-chrome-canary
brew cask install firefox
brew cask install firefox-nightly
brew cask install atom
brew cask install keepingyouawake
brew cask install mamp
brew cask install spectacle
```