Sudo killall VDCAssistant;sudo killall AppleCameraAssistant. Type your admin password to authenticate, and then try to use your webcam again. MacOS should relaunch any processes your webcam relies on to function. If you don’t feel comfortable using Terminal, just restart your Mac instead of running the above command. Restart Your Mac. Even so, end users are able to check if their Mac is still affected by running the command 'sudo -l' in the macOS Terminal, and seeing if pwfeedback is listed under 'Matching Defaults entries.' This command returns no output if the metadata was successfully stripped. If there is output, that means all metadata was not stripped. Do not proceed to the next step until all metadata is stripped. Go back to Finder and run Install.app. IM now starts and you can proceed with the installation.

Quick Links

Have you tried to use Telnet on MacOS only to find out it wasn’t there?You’re not alone, many have been disappointed to find out that Telnet hasbeen removed from modern versions of the system software starting fromMacOS Mojave and newer. These instructions will work for MacOS Mojave andnewer, I happen to be running Big Sur and this is what I did to get Telnetback.

Installing Telnet on MacOS with Homebrew

First I would like to mention that there is an easier route, that is usingHomebrew. I see a lot about it and many people seem happy with it but I havean aversion to putting it on my machine. If you don’t already have Homebrewon your machine, navigate over to the brew website and followthe installation instructions. I would caution against following themexactly though for security purposes. I would do it like this instead:

Open and inspect the install.sh script to see what it does and make sure you feelcomfortable running it on your machine. And then run it.

After installing Homebrew, install Telnet

Installing Telnet on MacOS by Building Telnet from Source

This was the method I used. There are some prerequisite steps though, if youdon’t already have them you’ll need to install the MacOS command line tools.

Step 1: Installing the command line tools

Open a terminal and enter the following line, you’ll then be shown a pop upprompt.

Click install when the prompt pops up.

After that you’ll be shown a license which you’ll have to agree to in orderto install.

After that you’ll see the download progress and the install will happenafter that. Unfortunately I forgot to get screen shots of the followingmessage boxes.

Step 2: Getting the Telnet source

For this step you’ll be getting the GNU network utilitiesnavigate to the download pageand find the latest source. At the time I’m writing this it’s 1.9.4:

Step 3: Extract the source

Step 4: Configure and build

Now that the source is extracted change into the directory:

Run the configure command:

Run the make command to build:

And then install:

Either way you choose is fairly easy, the build for this is pretty straightforward and was very quick. I don’t think it even took me 10 minutes tobuild and install.

These advanced steps are primarily for system administrators and others who are familiar with the command line. You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful when you want to install on multiple computers without downloading the installer each time.

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What you need to create a bootable installer

• A USB flash drive or other secondary volume formatted as Mac OS Extended, with at least 14GB of available storage
• A downloaded installer for macOS Big Sur, Catalina, Mojave, High Sierra, or El Capitan

Download macOS

• Download: macOS Big Sur, macOS Catalina, macOS Mojave, or macOS High Sierra
  These download to your Applications folder as an app named Install macOS [version name]. If the installer opens after downloading, quit it without continuing installation. To get the correct installer, download from a Mac that is using macOS Sierra 10.12.5 or later, or El Capitan 10.11.6. Enterprise administrators, please download from Apple, not a locally hosted software-update server.
• Download: OS X El Capitan
  This downloads as a disk image named InstallMacOSX.dmg. On a Mac that is compatible with El Capitan, open the disk image and run the installer within, named InstallMacOSX.pkg. It installs an app named Install OS X El Capitan into your Applications folder. You will create the bootable installer from this app, not from the disk image or .pkg installer.

Use the 'createinstallmedia' command in Terminal

1. Connect the USB flash drive or other volume that you're using for the bootable installer.
2. Open Terminal, which is in the Utilities folder of your Applications folder.
3. Type or paste one of the following commands in Terminal. These assume that the installer is in your Applications folder, and MyVolume is the name of the USB flash drive or other volume you're using. If it has a different name, replace MyVolume in these commands with the name of your volume.

Big Sur:*

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Catalina:*

Mojave:*

High Sierra:*

El Capitan:

* If your Mac is using macOS Sierra or earlier, include the --applicationpath argument and installer path, similar to the way this is done in the command for El Capitan.

After typing the command:

1. Press Return to enter the command.
2. When prompted, type your administrator password and press Return again. Terminal doesn't show any characters as you type your password.
3. When prompted, type Y to confirm that you want to erase the volume, then press Return. Terminal shows the progress as the volume is erased.
4. After the volume is erased, you may see an alert that Terminal would like to access files on a removable volume. Click OK to allow the copy to proceed.
5. When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS Big Sur. You can now quit Terminal and eject the volume.
   

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Use the bootable installer

Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps:

Apple silicon

1. Plug the bootable installer into a Mac that is connected to the internet and compatible with the version of macOS you're installing.
2. Turn on your Mac and continue to hold the power button until you see the startup options window, which shows your bootable volumes.
3. Select the volume containing the bootable installer, then click Continue.
4. When the macOS installer opens, follow the onscreen instructions.

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Intel processor

1. Plug the bootable installer into a Mac that is connected to the internet and compatible with the version of macOS you're installing.
2. Press and hold the Option (Alt) ⌥ key immediately after turning on or restarting your Mac.
3. Release the Option key when you see a dark screen showing your bootable volumes.
4. Select the volume containing the bootable installer. Then click the up arrow or press Return.
   If you can't start up from the bootable installer, make sure that the External Boot setting in Startup Security Utility is set to allow booting from external media.
5. Choose your language, if prompted.
6. Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions.

Learn more

A bootable installer doesn't download macOS from the internet, but it does require an internet connection to get firmware and other information specific to the Mac model.

For information about the createinstallmedia command and the arguments you can use with it, make sure that the macOS installer is in your Applications folder, then enter the appropriate path in Terminal: