I am using the normal cable Apple headphones and the voluma control works on my iPhone 5S, but not when I plug them into my Mac (Macbook Pro Early 2013, macOS Sierra 10.12.4). If I am not mistaken, they were working some time ago?

Any suggestions how I can fix this, or am I mistaken in that they should be working?

  • 1
    Have you tried to restart your Mac? Do you have your Mac connected to any other kind of speaker? – Harcker May 11 '17 at 7:21
  • 1
    I just restarted and I could change the volume, i.e. see the volume bar on the monitor, but a few seconds later not anymore. No other Speakers connected (no Thunderbolt monitor). – Rainer May 11 '17 at 8:09

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