No image/sound vía HDMI - MacBook Pro 15'' 2.53GHz

It might be worth taking it to Apple and getting them to have a look at it Now, with the simple command to kill and restart the core audio process, I have great sound on the work MacBook Pro, one again, Thanks! I had a very strange issue where sound through my Headset. I have an iMac, running Yosemite I was given a gift of a digital turntable which came with Audacity software version 2. I installed the software, started to follow the instructions for configuring it for Mac documentation was way out of date, the screen shots were for an earlier operating system and, before I knew it, all my sound was gone.

I've tried trying to find fixes online. None of them have worked. Settings in Sound preferences are seemingly set up correctly. I've now deleted the software from the computer and restarted the computer with no change. I've tried your suggestions up top of this article but Im a bit of a novice so am a little afraid of things like Terminal Windows. I just feel out of my depth here. Don't be afraid of Terminal, the commands above won't cause any harm to your computer.

You should try them and see if they make any difference. Did the digital turntable tell you to create an aggregate sound device by any chance? If nothing is working, ensure that your Speakers are selected as your primary Output device and that "Mute" isn't on obviously. Use the Terminal commands or just launch Activity Monitor to kill the coreaudiod process. It will restart automatically.

Fix Audio on a Mac

Make sure your turntable isn't connected to your Mac any more also. If nothing else can help, it may be time to reinstall your operating system. Hello Tim, I am a complete novice at recording. I need to have Windows on my Mac Pro for my work. I am trying to record on power point files on office I need to do a recording on each slide. This is working but when I replay the recording there is so much background buzz. It is terrible. I bought myself a set of the latest BOSE headphones with a speaker and tried this this morning but the buzz is still there.

Do you have any suggestions as to how I can make this sound more professional? Many thanks in anticipation. It sounds like the microphone is the issue in this case. Do you have multiple microphones connected to your Mac? Be sure to select the right one under Windows' sound preferences I can't remember where as it's been so long since I've used it.

Whenever you do connect the microphone you should make sure you select the right one as per the instructions above. Optionally you could try recording the audio on a smartphone in a quiet environment, but do keep in mind the audio quality is likely to be poor too. Once complete you can just send the file to your computer and import it into PowerPoint.

Never miss out

I am having troubles while using Skype on my iMac running El Capitan. I use my internal speakers and have the noise reduction clicked. While I am talking there is a large amount of feedback. I can hear my own voice echoing through my brother's speakers in England and there is a ton of high pitched squealing. I've tried everything I can think of. While it might not be idea, headphones will solve this issue.

No image/sound vía HDMI - MacBook Pro 15'' GHz - xuhecyfygu.tk - forum

It's possible that either you or your brother have your speakers too close to the microphone a common problem on laptops , which is causing the feedback problem. As you say you can hear your own voice, it sounds like the problem is on your brother's side. Either use headphones or the Skype mobile app to chat as you would normally on the phone to solve this one. Ran into a strange problem today regarding input and output channels. Perhaps more strange, when also having headphones plugged into the headphone jack, while the input is also plugged in, the sound is booted from my headphones and played through the internal speakers?

In the sound preferences, the "headphone" option disappears and automatically assigns itself back to the internal speakers. When I unplug the input jack and re-plug in the headphones, sound comes through the headphones as usual. I tested this through iTunes, since I am recieveing no audio via the input jack.

Connecting a Mac computer to a projector or TV or monitor using HDMI

The strangest of all these things is that this seems to have happened out of the blue. I have been doing this process for quite a while, specifically, recording from the mixer into Logic via the input jack and monitoring out through the headphone jack. I tried most of these steps but to no avail. Just wondering if you had any other ideas before I give it a full wipe.

Troubleshoot sound problems on Windows with Boot Camp

I've been struggling with distorted audio over google hangouts. We use it to play online games. I'm the only one using a mac and the only one having this issue. I was going to try your technique of killing the "coreaudioud" but when I called up the activity monitor I couldn't find it. Is this a file that comes and goes as needed? Open Activity Monitor, select the CPU tab, and search for "core" and it should pop up with about 5 other processes. It doesn't come and go, it should always be running.

Hence the system automatically restarting it when you kill it. You'll need to follow it up with your admin password which is your account password, if you're the main admin user. It sounds similar to the problems in Mavericks, but I'm using El Capitan, any ideas? El Capitan occasionally causes issues like this, though it's generally a lot better than Mavericks was.

This will also depend on what your hardware is. You'll need to type your admin password. Audio will stop for a second then the process will restart. I suggest you move on to resetting PRAM, as per the article, if this doesn't help. This is a very important article for every OS X user, thank you for this.


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My problem was no sound after unplugging headphones, sleeping iMac, then returning hours later. Although the sound bar was adjustable and not muted in preferences, no sound was to be heard, headphones in, or headphones out. Glad this article could help you out! I'm really glad El Capitan suffers from these audio problems a lot less than Mavericks did, but it's definitely handy to know how to restart Core Audio when things start sounding weird. Was enjoying watching using VLC and suddenly the audio was distorted for the speaking part but the background laughter, music was fine..

Really weird.. The mouse connected easily but I could never get the keyboard to connect, no matter what I tried. When doing a Google search I even tried some specific examples in the Apple support forum for this particular device.

The solution

Once I tried this it worked like a charm. My macbook is also slow. My macbook says it's on mute and wont play music, please fix!! There's not much I can really suggest with such a vague description. Assuming you've tried everything here, you might want to backup with Time Machine and reinstall OS X. If it's a software issue, that should fix it. Step 3: Verify that the volume icon is now present in your Menu Bar — you can click it to reveal a volume slider, or hold the Option key and click it to reveal a list of input and output devices.


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When using an HDMI connection, you will have to choose which audio out you want to use, and in my case, it just happened to be the sound-rich speakers that I wanted to use instead of the muffled built-in TV audio. Try this Anthony Bouchard on January 26, The sound was loud coming from the TV, so I decided to try and adjust it with the volume keys on my keyboard only to find the following prompt come up when attempting to press the volume up and volume down keys: So what gives?

My computer recognizes the HDMI cord and that option is selected. It's also selected via the opt button then clicking the sound, as well as through the MIDI application. I have also tried two different HDMI cords with no luck. I've been looking around and absolutely nothing fixes my problem. I'm really confused as to how my computer could recognize all this being connected and still produce no sound.

Can anybody help me figure this out? One like BlueRigger adapter should work perfectly for your application. Sign up to join this community. The best answers are voted up and rise to the top.