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.
- Step 1: Plug your USB flash drive in an available USB port on your computer. Step 2: Go to the Window Start Menu, then Computer. Step 3: You should see your USB flash drive.
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Find the appropriate download link in the upgrade instructions for each macOS version:
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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.
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.
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
MyVolumein these commands with the name of your volume.
- 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
Yto 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.
Usb Disk Drive For Mac
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:
In general, any new USB flash drive has no name. Once they plugged into PC, the machine would recognize it as a storage flash drive along with a drive letter without a name.
For instance, Windows 7 using the prefix “Removable Disk”, and Windows 10 using “USB Drive” as the default name.
In this tutorial, I’m going to show you the easiest way to rename a USB flash drive both Windows PC and Mac. Let’s get started.
How to name a USB flash drive on Windows PC
First of all, plug in your USB flash drive to the computer or laptop. Then, open My Computer or Libraries on your device.
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On the left sidebar, right-click on the desired USB DRIVE and click Rename. Roxio toast for mac.
You can also use a shortcut keyboard by click on the USB DRIVE and then press F2. Some characters are not allowed due to system concerns. So, it’s always recommended to use a letter or number solely.
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After renaming the drive, press the Enter button on the keyboard, and the new name will remain permanent even though you are using it on another PC.
How to Name a USB Flash Drive on Mac
First, plug in the USB drive to the Mac device. The device icon immediately appears on the desktop. Click on the icon name, once highlighted, press Return/Enter key on the keyboard.
Next, you can name it, and press Return/Enter key or click blank space on the desktop to confirm the new name. Similar to Windows, the name will remain forever unless you change by yourself.
Another method is via the context menu. Right-click on the USB flash drive, select Get info. Once a new window appeared, go to Name & Extension and change the name.
File security and privacy are cannot be negotiable. That’s why you have to protect USB flash drive with a password so an unauthorized user cannot access your private files.