Disabling sound output devices (e.g. Internal Speakers) in OS X Since my Cinema Display is both connected through mDP and USB, I can (stupidly enough) both choose “LED Cinema Display” or “Display Audio”.

Also, I never use the internal speakers since they sound extremely tinny.



How do I remove/delete/disable unwanted audio devices? It must be possible somehow!
kextunload is a formal interface for unloading kexts in the Darwin OS and in Mac OS X.


Unload the system audio driver:

sudo kextunload /System/Library/Extensions/AppleHDA.kext

Load it again:

sudo kextload /System/Library/Extensions/AppleHDA.kext

If not "AppleHDA.kext", another kernel extension in /System/Library/Extensions/ may be what you're looking for.