One Of My App Is Not Quitting Mac

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The world of digital security can be a scary one. With hackers in the news and a big ransomware scare just recently wrapping up, folks have good reason to be concerned. Staying secure online is crucial, and it starts with good security habits. But what if you’re concerned that someone is spying on you through your Mac’s webcam? Can you find out if a rogue app is accessing your Mac’s webcam?

It isn’t just an idle question. Not too long ago, there was a fad among troublemakers and hackers to make online “slaves.” It sounds worse than it actually is: basically, dumb kids (and some childish adults, I’m sure) would take over the webcams of unsuspecting targets and watch them go about their day. Sometimes, they would catch glimpses of people undressing, but the point was to invade someone’s privacy. This was based on a Windows exploit, but a ounce of prevention is worth a pound of cure.

May 12, 2020 Solution 1: Quit the Settings App. The first solution to solve 'apps not showing in settings on iPhone' issue is quitting the Settings app entirely. By simply quitting and starting again, the issue may get solved. Follow below steps to quit the Settings app: Navigate to the home screen and double-click the home button. Jun 22, 2015  If a Mac app becomes unresponsive, you can force it to close. (Typically if one has stopped working, you'll see 'Not responding' appear next to the application name.) Select the name of the app you'd like to quit. Click the Force Quit button. Bonus tip: Quitting the active app. Sep 22, 2017  Here’s how to force quit an app from the Apple menu: Click on the Apple logo in the top left corner of your screen. Select Force Quit. Choose the app that’s not responding. Click on the Force Quit button. Force quit from the Dock. If you wonder how to force quit an app on Mac using the Dock, check out these simple steps. Jun 10, 2016 Quitting an app on Windows is easier than doing so on a Mac. On Windows all you need to do is click on that red X sign. But on a Mac the red button only closes the application window. You need to manually quit the app. There are multiple ways to quit an app on a Mac, so if you do not feel comfortable with one way, you can use another.

Using lsof to Find Out What App is Using Your Webcam

The “stock” way to find out which app is using your webcam on a Mac is, unfortunately, not excellent. It requires some Terminal commands and a little bit of computer know-how. There are simpler ways that use off-the-shelf software, which we’ll cover below. If you’re comfortable with Terminal, however, you can use the Terminal command lsof to get a list of applications currently attempting to access your webcam.

1. Open Terminal (Applications/Utilities/

2. If you have a built-in webcam (like with a MacBook Pro or iMac), copy and paste the command below and press “Enter.” You can also type in the command, but be sure to be 100% accurate.

If you have a third-party webcam (like a Logitech model) copy and paste the following command and press “Enter.”

If you’re curious about what’s happening, we’re the lsof command tells you what process or application is using a specified system resource. By running lsof “naked,” or without flags, we would normally get a list of all the processes doing just about anything on our Mac. Then, we search through that list using grep to find references to the appropriate webcam interface.

3. In this case, the command will return a list of all the applications currently using (or thinking about using) your webcam.

Annoyingly, this list will likely include some extraneous applications. You’ll see stuff like the third-party software that runs your camera (if any). You’ll also often see Google Chrome listed. Even with this imperfect list, however, you’ll have a place to start scanning for suspicious or unexpected applications to investigate.

This list, though cryptic looking, is decipherable. If you look at the beginning of each line, you’ll see some familiar program names: in this case, Google and FaceTime. There’s also some unusual ones, like LCore and something called “avconfere.” Let’s investigate the odd ones.

4. To find out more about this processes, I can us the ps -p command, along with the process ID. The process ID is the number next to each program’s name, and it’s just a number that allows you to specify which particular program you want to investigate with Terminal.

5. For example, the following command will tell me more about the LCore process:


One Of My App Is Not Quitting Macbook Pro

If you’re curious about what we’re doing, the -p flag allows us to use ps to investigate the origin and status of a running process as specified by its process ID.

6. As we can see, that’s the Logitech kext that’s running my Logitech webcam, so that’s no danger. I can tell thanks to the location of the file, as well as a little Googling to confirm my suspicions.

7. Let’s try the same trick on the “avconfere” process using the command below:

8. That actually “avconferenced” which is the daemon that handles all webcam requests on macOS, so that’s also safe too. I know this because I Googled it, which you should do for any unusual processes. I also suspect it’s safe because it’s in the “libexec” folder, which contains system daemons and utilities. Of course, a clever attacker might disguise their process in that way, so always investigating anything you don’t recognize or understand.

Quitting Apps Using Your Webcam

If you do find a malicious application, you can quit it from the command line using the kill command.

1. Use the above process to determine the process ID of the application using your webcam.

2. Type kill #### where #### is the process ID of the application you want to quit. For example, to kill Chrome, I would type the following:

Using Oversight To Get Notified When Your Webcam Is Enabled

lsof has limitations, listing all the apps that might attempt to access your webcam (like Chrome) even if they’re not doing so currently. The freeware app, Oversight, which was developed by an ex-NSA hacker, is a good alternative. Oversight will alert you whenever your camera or microphone becomes active, and let you know which application has started using it. You can then approve or deny the usage directly from a notification.

1. Download and install Oversight.

2. When an application wants to use your webcam, Oversight will generate a notification.

3. Click Allow to allow the app to use your webcam, or Block to deny the usage.


There’s a couple of ways to find out which application is using your Mac’s webcam. And remember that built-in Mac webcams will always show their green “in use” light when operational. This is thanks to the physical wiring of the device. For power to reach the camera, it must also illuminate the LED. Thanks to this design, it’s hard to imagine a software exploit that would disable the light, but caution is rarely regrettable. If you’re really freaked out, don’t forget the lowest tech solution of all: a piece of tape stuck over your webcam’s lens.

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Hey there, marisavillaret!

One Of My App Is Not Quitting Mac Download

Thanks for using the Apple Support Communities. After reading your post, I understand that your Mail app keeps quitting unexpectedly on your MacBook. I rely on e-mail every day, so I know how important it is for the app to be working. I'm happy to help!

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Try the following steps, in order, testing after each.
  1. Quit the Mail app, then reopening it while holding the Shift key on the left-hand side of your keyboard.
  2. Restart your Mac by clicking the Apple  menu and selecting 'Restart..' from the drop down.
  3. Test to see if the Mail app quits in safe mode. You can get information on safe mode, including how to boot to it, in this article: Try safe mode if your Mac doesn‘t finish starting up
    Even though the title of the article isn't the same issue as what you're experiencing, safe mode is still a great step to try--it will run a scan of your system during boot, and will then disable certain software and processes that could be causing a conflict with your Mail app. Open the Mail app in safe mode, and see if it quits. Make not of the results, then restart the computer and try opening the Mail app again.
  4. Test the Mail app in a new user account. The following article provides information on why testing in another user account can be helpful, as well as walks you through how to set up a new account: How to test an issue in another user account on your Mac
Have a wonderful day!

One Of My App Is Not Quitting Machine

Oct 28, 2016 7:35 PM

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