Download Onto A Flash Drive Mac

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To get a working Catalina installer onto a USB flash drive it must first be formatted into a scheme that allows for an EFI Partition. Step 1: Formatting the USB Drive In order to create a bootable macOS installer the USB flash drive must be formatted as Mac OS Extended (Journaled) which will add a second hidden EFI partition needed to create a. This article teaches you how to move a movie you’ve downloaded on your Windows or Mac computer onto a USB flash drive. When downloading movies, make sure you aren’t breaking any laws in your country by pirating media. In most cases, you’ll need to purchase a movie before you can download it. Part1 Downloading a.

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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

Download Onto A Flash Drive Mac
  • A USB flash drive or other secondary volume, formatted as Mac OS Extended, with at least 12GB 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:*

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.

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 and a gear icon labled Options.
  3. Select the volume containing the bootable installer, then click Continue.
  4. When the macOS installer opens, follow the onscreen instructions.

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

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 the appropriate path in Terminal:

  • Big Sur: /Applications/Install macOS Big Sur.app/Contents/Resources/createinstallmedia
  • Catalina: /Applications/Install macOS Catalina.app/Contents/Resources/createinstallmedia
  • Mojave: /Applications/Install macOS Mojave.app/Contents/Resources/createinstallmedia
  • High Sierra: /Applications/Install macOS High Sierra.app/Contents/Resources/createinstallmedia
  • El Capitan: /Applications/Install OS X El Capitan.app/Contents/Resources/createinstallmedia

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.

The necessity of using software to copy a USB flash drive to another

Speaking of copying files from one usb flash drive onto another flash drive, you may think it as a piece of cake! For a small size of USB flash drive with files, applications or even OS on it, yes, it's easy, just a Ctrl C + Ctrl V can make it. What about a flash drive having enormous data there? Will you spend hours and do nothing but wait? Let alone the process would interrupt repeatedly due to errors, such as 'an unknown file error occurred' or 'filename too long to copy', etc.

Transferring files onto a USB flash drive

Considering the aspects of copy time and potential incidents, it's necessary to come up with some USB image tools with competent ability to copy a flash drive to another flash drive without a hitch.

How to copy a flash drive to another flash drive on Windows

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If you are a Windows PC owner, download and install EaseUS Todo Backup for Windows on your PC. It's Windows backup software that supports to copy all files, applications, and system on your flash drive and save the image file to another one.

Insert both your flash drives on the computer, and run EaseUS Todo Backup.

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Tip
If you've saved data in the new USB flash drive, move those data and empty the USB in advance. Otherwise, if you directly clone your current USB data to the new one, data loss issue will occur unavoidably.
Create

Best Flash Drives For Macs

Step 1. Connect new USB flash drive to your PC
First of all, please connect the new flash drive to your PC, making it recognizable by the PC.

Step 2. Run EaseUS Todo Backup for cloning USB to USB
Run EaseUS Todo Backup on your PC and click Clone on the left pane so as to start cloning USB.

Step 3.Clone USB to USB with easy clicks
1. Choose your old USB as the original source disk.

2. Select the destination disk - new USB flash drive for saving cloned data.

3. Click Proceed to start cloning USB to USB now.

Bootable Flash Drive Mac

After cloning, you should now keep two identical flash drives with the same partitions, data, and files.

How to copy a flash drive to another flash drive on Mac

If you are a Mac owner, download and install EaseUS Todo Backup for Mac on your Mac computer. It's all-in-one software for data backup, backup archive, disk clone, and file synchronization.

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Insert both your flash drives on the computer, and run EaseUS Todo Backup for Mac.

Boot From Flash Drive Mac

Step 1. In the From drop-down list, select the volume you want to clone, which should be the source usb flash drive.

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Mac

Download Mac Os Onto A Flash Drive

Step 2. In the To drop-down list, select the other flash drive as the destination disk.

Step 3. Set up the disk cloning properties. Here, you are allowed to exclude files or folders if necessary.

Step 4. Finally, click the Start button to execute the cloning operation.