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When I plug my (HDMI) display into my laptop, the sound output switches to it. I can switch it back, but is there any way to stop this automatic switch?

(I've found many people complaining, but no answers. A script which reversibly disabled HMDI audio would be acceptable.)

9

I have multiple devices I connect to my mac and for some they had the same issue.

The work around (or actual fix) is to open 'audio midi setup' in your applications>utility folder and create a 'new aggregate device' or multi-output device' and turn off/on the inputs/outputs sound based on needs.

The plus sign on the bottom left corner. enter image description here

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    Awesome! Thanks a bunch. Only problem is the sound keys and system audio slider don't work: prntscr.com/feufup . What ways have you found of adjusting volume? I have quicksilver and Karabiner so perhaps I could map some key or keystroke sequence to a script which controls the volume? – tog22 Jun 1 '17 at 22:05
  • ALoha, sorry for the delay. Just click on the configure speakers and you can adjust sliders there, cheers :) – norcal johnny Jun 14 '17 at 20:16
  • Not on 10.11 - the MIDI app looks different from your screenshot on that too. I'll say if it works on 10.12. – tog22 Jun 14 '17 at 23:45
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    Needing to open the MIDI app just to change volume is crazy. – Matthew Read Oct 8 '18 at 17:18
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    I don't understand how this is the correct answer. You create an aggregate for multiple sound devices and then what? For me if I connect via Airplay to my AppleTV it still tries to use the speakers connected on that monitor. – believesInSanta Mar 7 at 20:47

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