Last week, I tried to play music through my MacBook Pro. No sound is coming from either my internal speakers OR my headphone jack. I feel like I read a million threads but none of them seem to apply to my issue. In my Settings>Sound it still displays my "Internal Speakers - Built-in" as the sound output. When I try to adjust the volume, the icon appears normally on the screen. There is no line through it, or simply doesnt work, as other users have posted. I have no red light shining from my headphone jack. Headphones also do not work. Everything (software Wise) seems to be set up exactly as it should be, but still no sound! Could this be a hardware issue? From the time my sound worked to when it stopped working my MBP was just sitting on my desk! Not sure what else to try. Any help would be greatly appreciated.
Sorry for the delay in response. Thankfully, a tech person with whom I work discovered the update, so I am not totally sure. I think that she simply switched my software update schedule to every day (instead of weekly), and the firmware was simply part of an update package that was waiting for me. Sorry that this isn't too helpful. I'll try harder to remember to ask her how exactly she accessed the update.