module UserAgent::OperatingSystems

def self.normalize_mac_os_x(os)
  if os =~ /(?:Intel|PPC) Mac OS X\s*([0-9_\.]+)?/
    if $1.nil?
      "OS X"
    else
      version = $1.gsub('_', '.')
      "OS X #{version}"
    end
  end
end