Live-reload troubles: Compiling file system watcher for Mac

Is there a connection between those warnings and the failure of the phoenix live-reload?

NO !!!
I have added this line ~r{lib/.*(ex)$} in the endpoint file, and everything’s working now.

config :my_app, MyAppWeb.Endpoint,
  live_reload: [
    patterns: [
      ~r{priv/static/.*(js|css|png|jpeg|jpg|gif|svg)$},
      ~r{priv/gettext/.*(po)$},
      ~r{lib/.*(ex)$}
      # ~r{lib/my_app_web/views/.*(ex)$},
      # ~r{lib/my_app_web_web/templates/.*(eex)$}
    ]
  ]

isn’t Phoenix.CodeReloader watching the lib directory by default?