Hy. First, Thank you @Jake Loso much for the great help.
I am on the same situation , the company provided me the same model, and I and running HS10.13.16.
Last week, something strange happens.
When I try to use a headphone, I only can hear a terrible noise, what doesn't happen in the laptop speakers I've already try use kext utility to repair permissions , but no success.
On console I only have this log about sound:
Sep 17 08:01:06 mcezzares-MacBook-Pro com.apple.xpc.launchd[1] (com.apple.preference.sound.remoteservice[1112]): Service exited due to signal: Killed: 9 sent by com.apple.preference.sound.remot[1112]
What can I do ? Do you have any suggestion ?
Thank you so much.