Home Brew

packages not provided with mac os

on Mac os needs developer Command Line Tools

xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), 
missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrunxcrun: 

Example usage:
  brew search [text|/regex/]
  brew (info|home|options) [formula…]
  brew install formula…
  brew update
  brew upgrade [formula…]
  brew uninstall formula…
  brew list [formula…]

Troubleshooting:
  brew config
  brew doctor
  brew install -vd formula

Developers:
  brew create [URL [--no-fetch]]
  brew edit [formula…]
  https://github.com/Homebrew/brew/blob/master/docs/formula-Cookbook.md

Further help:
  man brew
  brew help [command]
  brew home