External audio connects not (stroke of lightning/airplay/bluetooth)

Hello

I'm on OS / X El Capitan 10.11.4 on MacBook Pro (retina, 15 inch, mid-2014).

For some time - I can not connect my audio outputs / interfaces audio external

-When I change my sound output using alt + volume icon on the top menu, nothing happens (when I return to this menu remains in 'internal speakers' output)

-When I select in 'sound' in system preferences, it is selected, but the sound is still coming from internal speakers.

These devices include

-Airplay to ATV2 - it is worth noting this is see "airplay: off" in the menu airplay

-Audio Bluetooth - pairs and connects fine, but the same thing happens for audio

-Focusrite clarett 4pre audio interface of love at first sight. I have installed the required software & drivers before you connect the appliance. When I turn on the camera - I don't like sound output in the sound menu, even if it is listed under the section 'Information system' love at first sight.

-I don't have an interface audio firewire (steinberg MR816), that was installed before the problem occurs, and this device connects very well.

I have already tried:

-Removing audio and bluetooth & associated airplay .perf files in / library and ~ / library, then by restarting

-Remove all applications from the login items "Users & groups" to improve the connectivity of the airplay.

-Reset the PRAM

-Creating a new user with the ' parameters '.

-I could have messed up with other parameters I remember currently.

I couldn't find anywhere to tell me how to reset the audio settings of the mac completely, and I really want to avoid the formatting and reinstallation of mac.

I would be extremely useful for any help.

Thank you

Later to perform a system recovery to solve the above problems

Tags: Mac OS & System Software

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