The 1.9 version of HighSierraMediaKeyEnabler for Mac was provided as a free download on our website. This free Mac application was originally created by Milan Toth. The software belongs to System Tools.
From the developer:
High Sierra Media Key Enabler is an application for iTunes and Spotify. You can prioritize which app you would like to control or you can go with the default behaviour which controls the running app. The app runs in the menu bar in the form of a subtle and beautiful black dot.
You may want to check out more Mac applications, such as WebGrab-FF2 or Startup Chime Stopper, which might be related to HighSierraMediaKeyEnabler.