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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.
What you need to create a bootable installer
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- 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
- Right Click on Macbook with Bootcamp SOLVED.
- There are a few reasons why you might want to reinstall macOS (or even Mac OS X). Perhaps your Mac is working erratically and you think that a clean install of the operating system might fix the.
- Connect the USB flash drive or other volume that you're using for the bootable installer.
- 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 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:*
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:
- Press Return to enter 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 volume is erased. - 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.
- 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.
Use the bootable installer
Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps:
Apple silicon
- Plug the bootable installer into a Mac that is connected to the internet and compatible with the version of macOS you're installing.
- Turn on your Mac and continue to hold the power button until you see the startup options window, which shows your bootable volumes.
- Select the volume containing the bootable installer, then click Continue.
- When the macOS installer opens, follow the onscreen instructions.
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- Plug the bootable installer into a Mac that is connected to the internet and compatible with the version of macOS you're installing.
- Press and hold the Option (Alt) ⌥ key immediately after turning on or restarting your Mac.
- Release the Option key when you see a dark screen showing your bootable volumes.
- 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. - Choose your language, if prompted.
- 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:
Dec 21, 2020 • Filed to: Solve Mac Problems • Proven solutions
Recovery Mode in OS X provides a set of solutions for users to utilize when users need to repair and reinstall their operating system in an emergency. You can also reset the Mac password using recovery mode if needed. There are several ways to boot Mac into recovery mode. If you find one method overwhelming, there are several other alternatives you can use. We will walk you through the different ways on how to boot Mac into recovery mode so that they will become undoubtedly useful in a rare emergency.
Part 1: How to Boot Mac in Internet Recovery Mode
Along with the introduction of a locally stored recovery volume, Apple introduced its Internet Recovery service that allows your operating system to download contents of the recovery hard disk partition from the company's service. This option is great to use when your local drive is completely corrupted and you no longer can access locally-stored recovery tools.
To launch Internet Recovery, make sure your Mac is connected to a WiFi network and follow the steps below:
- Reboot your Mac.
- Hold the 'Options', 'Command', and 'R' buttons until the boot chimes are triggered.
- Wait until the system finished downloading the recovery tools from Apple's website.
It is noted that you are unable to boot Mac into Recovery Mode if you are using devices older than the ones below:
- MacBook Pro (13-inch, Early 2011)
- MacBook Pro (15-inch, Early 2011)
- MacBook Pro (17-inch, Early 2011)
- iMac (21.5-inch, Mid 2011)
- iMac (27-inch, Mid 2011)
- MacBook (13-inch, Mid 2010)
- MacBook Pro (13-inch, Mid 2010)
- Mac mini (Mid 2010)
- MacBook Pro (15-inch and 17-inch, Mid 2010)
- iMac (21.5-inch and 27-inch, Mid 2010)
- MacBook Air (11-inch and 13-inch, Late 2010)
Part 2: How to Create a bootable drive into Recovery Mode
You can create a bootable drive to store an OS X Recovery Disk so that you can access recovery tools anytime, anywhere. It would be great if you could invest in a high-capacity USB 3.0 flash drive to store the required tools.
There are plenty of articles outlining how you can create a bootable OS X Recovery Disk, including ours. Once you have this established, you can follow these steps to get your Mac into Recovery Mode:
- Reboot your Mac.
- Hold down 'Option' on your keyboard once you hear the chime sound.
- Attach your bootable OS X Recovery Disk to your Mac and select it from the prompt list.
- Your Mac will launch into Recovery Mode and you can start fixing your Mac.
As you can see, there are plenty of methods you can use to boot Mac into Recovery Mode. There is no need to panic when you find yourself in trouble - just choose and master the method that seems least intimidating to you and you will be well on your way. After you boot Mac into Recovery Mode, you can also restore your data on Mac.
Part 3: How to Boot Mac with Installation Disk
If you are using an older Mac, it probably comes with a grey recovery DVD that you can use to run recovery routines. If you had bought a copy of a newer operating system, you can also use the installation disk to perform recovery.
It is the easiest way to go into Recovery Mode and here is how you can do it:
- Insert the grey DVD and reboot your Mac.
- Hold down 'C' on your keyboard until you hear the boot chimes.
The recovery tool will take some time to load. Follow the wizard that will put your Mac into Recovery Mode.
Part 4: How to Boot Mac into Recovery Mode with Local Recovery
- Reboot your Mac.
- Hold the 'Command' and 'R' buttons until the boot chimes are triggered.
- You will see the OS X utility window that will prompt you to choose one of the four options.
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Part 5: How to Boot Mac into Recovery Mode from Time Machine
It is really important to keep backups of your machine and Apple facilitates this with its Time Machine feature. It would be best to store your backup on an external drive so that you can initiate Recovery Mode using this when your hard drive is wiped out.
Follow these steps to boot Mac into Recovery Mode:
- Reboot your Mac.
- Hold down the Option button when the startup chimes sound.
- Connect your Time Machine drive. It will take some time for the system to detect the drive. You might need to key in your password.
- Choose the drive to launch your Mac into Recovery Mode.
After all the above methods, you finally fail to boot your Mac into Recovery mode. Don't worry. We also provide further solutions for you - Fix 'Cannot boot into Recovery mode'. For those who need the data recovery solution, Recoverit would be a nice option. Free download and try it now.
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Video Tutorial on How to Boot Mac into Recovery Mode
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