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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Download macOS
Find the appropriate download link in the upgrade instructions for each macOS version:
macOS Catalina, macOS Mojave, ormacOS High Sierra
Installers for each of these macOS versions download directly to your Applications folder as an app named Install macOS Catalina, Install macOS Mojave, or Install macOS High Sierra. If the installer opens after downloading, quit it without continuing installation. Important: 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.
Installers for each of these macOS versions download directly to your Applications folder as an app named Install macOS Catalina, Install macOS Mojave, or Install macOS High Sierra. If the installer opens after downloading, quit it without continuing installation. Important: 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.
The software for Mac, MacOS High Sierra, has a glitch that lets anyone login to a computer — without a password. On Tuesday, 'researchers disclosed a bug that allows anyone a blindingly easy method of breaking that operating system's security protections,' Wired reported. I am currently researching installing OS X 10.13 High Sierra on unsupported Macs. I did the Sierra upgrade on a couple of MacPros 4,1 and it has worked excellently, after I did a firmware update patch to get it to read as a MacPro 5,1, so I am very optimistic on doing it again.
- Mar 12, 2020 Plug the bootable installer into a compatible Mac. Use Startup Manager or Startup Disk preferences to select the bootable installer as the startup disk, then start up from it. Your Mac will start up to macOS Recovery. Learn about selecting a startup disk, including what to do if your Mac doesn't start up from it. Choose your language, if prompted.
- Nov 28, 2017 Anyone Can Hack MacOS High Sierra Just by Typing 'Root' A Turkish company found a glaring flaw in Apple's desktop operating system that gives anyone deep access, no password required.
OS X El Capitan
El Capitan downloads as a disk image. 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.
El Capitan downloads as a disk image. 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
- Connect the USB flash drive or other volume that you're using for the bootable installer. Make sure that it has at least 12GB of available storage and is formatted as Mac OS Extended.
- Open Terminal, which is in the Utilities folder of your Applications folder.
- Type or paste one of the following commands in Terminal. These assume that the installer is still 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.
Catalina:*
Mojave:*
High Sierra:*
El Capitan: - Press Return after typing the command.
- When prompted, type your administrator password and press Return again. Terminal doesn't show any characters as you type your password.
- When prompted, type
Y
to confirm that you want to erase the volume, then press Return. Terminal shows the progress as the bootable installer is created. - When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS Catalina. You can now quit Terminal and eject the volume.
* If your Mac is using macOS Sierra or earlier, include the
--applicationpath
argument, similar to the way this argument is used in the command for El Capitan.Use the bootable installer
After creating the bootable installer, follow these steps to use it:
- Plug the bootable installer into a compatible Mac.
- Use Startup Manager or Startup Disk preferences to select the bootable installer as the startup disk, then start up from it. Your Mac will start up to macOS Recovery.
Learn about selecting a startup disk, including what to do if your Mac doesn't start up from it. - Choose your language, if prompted.
- A bootable installer doesn't download macOS from the Internet, but it does require the Internet to get information specific to your Mac model, such as firmware updates. If you need to connect to a Wi-Fi network, use the Wi-Fi menu in the menu bar.
- Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions.
Learn more
For more information about the
createinstallmedia
command and the arguments that you can use with it, make sure that the macOS installer is in your Applications folder, then enter this path in Terminal:Catalina:
Mojave:
High Sierra:
El Capitan:
If you have a Mac computer and you are using latest version of Apple operating system, MacOS High Sierra then you have to take a lot of safety measures. Macs have been infected with an endangering risk that allows unauthorized users to get into your computers without any passwords or security checks leaving all your personal data at stake.
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This default permits uncertified user to get physical access of your computer, known as “root” without any password.
This vulnerability is similar to one Apple patched last month, which affected encrypted volumes using APFS wherein the password hint section was showing the actual password of the user in the plain text.
This vulnerability is similar to one Apple patched last month, which affected encrypted volumes using APFS wherein the password hint section was showing the actual password of the user in the plain text.
Here’s How to Login as Root User Without a Password
If you want to try this exploit, then, all you gotta do is follow these steps from admin or guest account:
- First, open system preferences on machine.
- Then, select users and groups.
- Click the lock icon to make changes.
- Then, Enter “root” in the username field of a login window
- Don’t enter anything into the password field and leave it blank. Then press the enter button several times.
After a few tries, Macos High Sierra logs in the uncertified user allowing them access as “superuser” which permits to read and write to system files.
![Hack into mac high sierra ca Hack into mac high sierra ca](/uploads/1/2/6/0/126080248/603852903.jpg)
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Making use of the MacOS login screen any user can get access to your mac with FileVault trying that root trick.
All they have to do is Click “other” on login screen and enter “root”
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Somehow, it is not near to possible to exploit this endangerment when a Mac machine is turned on, and its screen is secured with a password.
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Ergin publicly contacted Apple Support to ask about the issue he discovered. Apple is reportedly working on a fix.
“We are working on a software update to address this issue. In the meantime, setting a root password prevents unauthorized access to your Mac. To enable the Root User and set a password, please follow the instructions here: https://support.apple.com/en-us/HT204012. If a Root User is already enabled, to ensure a blank password is not set, please follow the instructions from the ‘Change the root password’ section.”
Here’s How to Temporarily Fix the macOS High Sierra Bug
A temporary fix has been discovered. To fix this error you need to enable the root user with a password.
To fix this problem. The steps you need to follow are:
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- Open System Preferences and Select Users & Groups
- Click on the lock icon and Enter your administrator name and password there
- Click on “Login Options” and select “Join” at the bottom of the screen
- Select “Open Directory Utility”
- Click on the lock icon to make changes and type your username and password there
- Click “Edit” at the top of the menu bar
- Select “Enable Root User” and set a password for the root user account
This password won’t let anyone access your Mac with a black password.
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To be secure, you need to disable Guests accounts on your Mac. For this, you need to head on to System Preferences → Users & Groups, select Guest User after entering your admin password, and disable “Allow guests to log in to this computer.”