PauseMate

Automatically pause iTunes or Spotify when you unplug your headphones. PauseMate sits discretely in your status bar and detects when you unplug/plugin your headphones. You have the choice to either automatically Play, Pause, Resume or just do nothing when the app detects a change in the headphone jack. This makes your Mac behave the same way as your iPhone already does when you unplug your headphones. No more embarrassing moments when you listen to your "guilty pleasure" playlists.