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If the sound on your Mac has stopped working, there are a number of possible explanations and solutions. The first thing to check is that the sound definitely is not working. Below we'll explain what to check.
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No sound on Mac? Check these things first
1. Check the volume
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As simplistic as it may seem, the first thing to check is that the volume hasn’t been muted intentionally. Tap the volume up (F12) key to turn up the sound level.
Pro tip: If you hold down Option+Shift when you press F12 or F11 to increase or decrease the volume, it will move in smaller increments than the full step changes that occur when you use the keys on their own.
2. Is it an app problem?
It may be that there’s no sound on your Mac because it won’t play audio in a specific app. If, for example, you can’t hear sound from a video in Safari, make sure the audio isn’t muted, by clicking the volume control in the video. You should also check other sound sources, like iTunes and QuickTime movies to find out if they can play sound.
Tip: if you’re fed up with websites you visit automatically playing video with sound when you’re working, go to Safari>Preferences and click the Websites tab. Click Autoplay, and in the bottom right of the window, choose Stop Media with Sound.
3. Check for hardware issues
Next, check there’s nothing plugged into the headphone/line out port and look to see if there’s a red light on that port. If there is, it could be there’s a problem with the port, or something blocking it. Try blowing on it to clear dust, if that’s the case.
4. Are you running the latest version of macOS?
If there’s still no sound on your Mac, Apple’s advice is that the first thing you should do is make sure you’re running the latest version of macOS.
To check which version of macOS your Mac is running, click the Apple menu and then About this Mac. The window that opens will have the name of the version of macOS currently installed at the top. Now the latest version is macOS High Sierra. If you’re not running High Sierra, you should consider installing it by going to the App Store app, and clicking on it in the sidebar on the right hand side of the main window.
If you don’t want to install High Sierra, at least make sure you’re running the latest update to whichever version of the OS is installed. To check that, click Software Update in the About this Mac window. That will check for updates and let you know if there’s one available. If there is, install it.
Before you install either a new version of the OS or an update, backup your Mac using Time Machine, or whichever backup tool you normally use.
5. Run Maintenance scrips
If you’ve determined your Mac’s sound definitely isn’t working, consider running CleanMyMac X’s Maintenance scripts. These optimize the performance of your Mac by running a number of routines such as repairing disk permissions, verifying your startup disk, and rebuilding the launch services database.
Here's how to run Maintenance scrips:
Download CleanMyMac X here (it's free to download).
- Launch the app.
- Click Maintenance.
- Choose Run Maintenance Scripts and click Run.
Following this link, you can get CleanMyMac at 20% off.
How to check your sound settings
If you’re running the latest version of macOS and your sound still isn’t working, the next step is to check your Sound settings.
- Click on the Apple menu and choose System Preferences.
- Click on the Sound pane.
- Select the Output tab and choose Internal Speakers. If that’s not available as an option, contact Apple Support.
- Check if the volume slider is low, if so slide it to the right and check the sound again.
- Make sure the Mute box isn’t checked.
If, when you check your sound settings, you see a USB device selected rather than Internal Sound, and you can’t change it, disconnect all USB devices from your Mac and try again.
Is there an app interfering with the sound?
Some applications, like screen recorders, install their own audio output drivers so that when you record the screen you can direct your Mac’s output to the recording app. It’s possible that if you’ve installed an app like that, its driver could be interfering with your Mac’s sound output.
- Go to System Preferences and choose Sound.
- Click on the Output tab.
- If there’s an output option that looks like a software app and it’s selected, that may be why the sound is not working on your Mac.
The best thing to do in that instance is to uninstall the app. You could just drag the app to the Trash, but that won’t uninstall it properly or remove all the files the app has placed on your Mac. To do that, you should use a dedicated uninstaller like CleanMyMac X.
CleanMyMac makes it very easy to completely uninstall any app so that it doesn’t leave any fragments or stray files behind. By using CleanMyMac, you can be sure you’ve deleted all the files associated with the app and that it hasn’t left anything behind. You can download CleanMyMac for free here.
Restart the sound controller
If there are no software audio drivers interfering with your Mac’s sound output, nothing plugged into the headphone jack, USB, or Thunderbolt ports, and your sound still doesn’t work, the next step is to restart the sound controller. This requires launching Activity Monitor and quitting a process, but don’t worry, it’s not too scary!
- Go to Applications>Utilities and double-click on Activity Monitor to launch it.
- In the search bar, type 'coreaudiod’ to locate the Core Audio controller.
- Click on coreaudiod, then click ‘X’ in the tool bar to quit it.
- Coreaudiod will restart.
Mac volume not working and stuck on mute?
If the volume control is not working on your Mac, either using the keyboard or the slider in the menu bar or System Preferences, it could be ’stuck’ on mute. The most common occurrence of this problem is on pre-2015 Macs that had a digital audio output support in the headphone jack.
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On those Macs, there was a sensor in the port that detected whether a headphone jack or a digital audio device was plugged in. The Mac would then change the output to headphones or digital output accordingly. However, sometimes the sensor failed to recognise when a digital audio device had been unplugged and so the audio output remained locked on digital output, with no way to change it. With no digital audio output connected, there is no way to change the volume or hear sound.
The solution in that case is to plug the cable back in to the socket and remove it again. Try it a few times, if necessary, to ‘trip’ the sensor and make the Mac recognise the digital audio device is no longer connected. If that doesn’t work, there could be some gunk blocking the socket. Try blowing on it to remove any dust. If that doesn’t work, buy a can of compressed air and, carefully, spray the socket to bow out the dust.
If that still doesn’t do the trick, buy a foam-tipped swab (don’t use a cotton bud as these leave tiny threads behind) and dip it in rubbing alcohol. Put the swab into the headphone jack and clean it, wiping away as much of the link as possible.
Bluetooth sound not working on Mac
Your Mac can play audio wirelessly via Bluetooth, so if you have Bluetooth speakers or headphones, you can use those to listen to music, or anything else on your Mac. Sometimes, however, they don’t work.
Make sure Bluetooth is switched on.
- Go to System Preferences and click the Bluetooth pane.
- If it says Bluetooth turned off, turn it on.
Make sure your headphones or speakers are connected.
- Look in the list of devices in the main window to see if your headphones or speakers are listed.
- If not, put them in pairing mode (you’ll need to refer to their instructions to find out how to do that) and when they appear, click Connect.
- If they are listed but not connected, make sure they’re switched on and Control-click on them in the main window and choose Connect.
Tip: If you check the box labelled Show Bluetooth in menu bar in Bluetooth preferences, you can connect from the menu bar item.
Once your headphones or speakers are connected, click on the volume control in the menu bar and choose them. If you don’t have the volume control displayed on the menu bar, go to System Preferences, choose Sound and then the Output tab and select the Bluetooth speaker or headphones. While you’re there, it’s a good idea to check the box labelled Show volume in menu bar — it’s in the Sound Effects tab.
To conclude, there are a number of reasons why the sound is not working on your Mac. If you follow the guide above and take it one step at a time, you should be able to fix the problem. If none of the steps above work for you, the next step is to contact Apple support and, if possible, make an appointment at the Genius Bar of an Apple Store. If that’s not possible, Apple will advise you on the best course of action to get your audio working again.
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With the age of the Internet in full swing, telecommunicating apps have become an integral part of the way that we connect with each other – in and out of work.
These marvellous applications allow us to connect with friends, family, and colleagues all over the world, and do business from wherever you might be based.
However, much like everything else, these applications are still far from perfect. One of their biggest drawbacks and challenges for the developers to overcome is the issue of background noise.
Noise cancelling technology is far from a new invention, but only now are we really seeing a great need, and demand for its widespread integration with telecommunication services.
Even the smallest amount of background noise has a negative impact on the quality of your calls. These unwanted noises make can make it challenging to properly hear and understand one another.
This is certainly something that everyone has experienced at least once, and such mishaps sap efficiency, costing time and money.
So, without further ado, and following on from our previous article covering the noise cancelling apps for Windows, here is our selection of the best active noise cancellation apps currently available for Mac.
1. Krisp
If you regularly make lots of conference calls in a noisy office or public space, this app will certainly come in handy. Krisp removes background noise during calls in real time.
This clever app is able to remove the background noise at your end for the other call participants, as well as the noise coming across from the other call participants to you.
Both features work at the same time, allowing you to make calls without having to worry about background noise getting in the way.
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Krisp currently works with over 600 conferencing, messaging and streaming apps. All you have to do is run the app in the background. All audio processing takes place locally on your device, a feature designed to keep your audio data as secure as possible.
The app performs the cancellation of background noise with exceptionally low latency (15 milliseconds). As a result, your calls are able to flow as smoothly as possible, and it also means that you will be able to make, and answer calls, with even a less than ideal Internet connection.
Krisp is powered by a Deep Neural Network which is trained to recognise and remove unwanted background noise, the result is that only clear human voices can be heard at each end of the call. Give it a go, and experience this game-changing app for yourself – you won’t look back.
2. Noise Blocker
Noise Blocker is an easy-to-customise noise gate that help you mute any unwanted noise coming through your microphone during calls, making recordings, streaming and when gaming.
Noise Blocker allows you to record samples of any noises that you wish to block out. The application then analyses any incoming audio against your noise “blacklist” and mutes the unwanted sounds accordingly.
Examples of the types of sounds that Noise Blocker is able to filter out are things like: mouse and keyboard clicks, laptop fans, and background static. This program works with all major telecommunication apps like Skype, Slack, Discord, and Google Hangout.
It is worth noting that it does take some time and effort to properly customise Noise Blocker to suit your noise cancelling needs. You will need to record in, and maintain your list of blocked sounds to get the most out of the app.
3. Noise Gator (Noise Gate)
Noise Gator is a handy lightweight app that can be used to help cancel out undesirable background noises, thus improving the quality of your calls made using telecommunication apps like Skype.
It does require a little manual fiddling to get started – you must configure the input and output, and also adjust the volume controls and set a noise threshold.
Once you have set everything up, you are good to go. Noise Gator analyses the audio level in real time, and if the average level is higher than the threshold that you previously specified within the app, the audio passes through the gate as normal.
However, if the average level falls below the threshold, the gate closes and the audio is cut off.
In simpler terms, the app acts as a noise gate for both your microphone (sound input) and your speaker(s) (sound output).
Noise Gator can also be paired with a virtual audio cable which will allow you to gate noise from your own mic, or to send the audio from your mic out through your speakers.
4. Samson Sound Deck
Samson Sound Deck for Mac noise cancellation app works great for making calls, recordings, and also for voice chat when gaming.
This app uses digital noise reduction algorithms to improve audio quality by identifying, and cancelling out those pesky repetitive background noises.
This handy piece of kit also has a built-in digital audio recorder which allows you to easily save and export all of the audio files that you have recorded.
The built-in audio recorder can be used to conduct webinars, create full audio files or quickly record voice memos.
The app gives you control over a good number of customisable filters, and the app can be quickly disabled once you have found a peaceful area with minimal undesirable external sounds to contend with.
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5. Sleep Pillow
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Sleep Pillow works by playing back high-quality ambient sounds which has the effect of creating an atmosphere well-suited for improving your quality of sleep, and also for boosting your productivity by cancelling unwanted background noise at work.
Sleep Pillow is a decent option, but as with most free apps, it does come with some minor flaws.
Downloaded over three million times, most users praise this app’s ability to drown out background noise, but a large chunk of users have reported that it feels somewhat limited, and that the noise cancelling sounds used by Sleep Pillow are rather short in length.
This means that it is easily noticeable whenever a loop restarts, something that can become a distraction in itself.
Finally…
More and more people are beginning to understand how drastic an impactbackground noise can have on productivity and concentration levels, whether you are working remotely from home, or in the office. We hope that this short list will aid you in your quest to eliminate pesky background noises and improve the quality of your calls.
One final tip, if you regularly use (or plan on using)noise cancelling headphones when making calls over the Internet, then you should definitely consider addingKrisp to your arsenal.
This niftynoise cancelling app filters out pesky background noise at both ends, leading to a significant boost in the quality of your calls. Try it for yourself, and let us know how you get on in the comments!
Does background noise often negatively affect the quality of your conference calls? Can you recommend any noise cancelling apps for Mac that we might have overlooked? Let us know in the comments section below…