Create Bootable Usb From Dmg Mac Mavericks

Apple released the new Mac OS X 10.10 Yosemite in the Mac App Store for everyone to download and install for free on October 16th, 2014, but downloading a 5+ GB file for each of your computers will take some serious time. The best thing to do is download it once and create a bootable install USB drive from the file for all of your Macs. Jun 07, 2017  Mavericks OS X is the latest update from the Apple for the MAC users. The new OS update is available as a free download via the App Store. On the same day we posted an article 2 Ways to Create Bootable Mavericks OS X USB Drive. But most of the users are looking for the way to create a bootable Mavericks ISO disc.

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.

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.

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

  1. 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.
  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 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.

    High Sierra:*
    El Capitan:
  4. Press Return after typing the command.
  5. When prompted, type your administrator password and press Return again. Terminal doesn't show any characters as you type your password.
  6. 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.
  7. 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:

  1. Plug the bootable installer into a compatible Mac.
  2. 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.
  3. Choose your language, if prompted.
  4. 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.
  5. 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:



High Sierra:

El Capitan:

This guide deals with 3 ways of making a boot disk from OSX 10.9 Mavericks the first one is the fastest and is done via the Terminal from a new command already in OSX Mavericks called createinstallmedia , the other 2 are older ways when Mavericks was in development and are done with a mixture of finder using Disk Utility and command line.

Quickest Way

Download Mac OSX 10.9Mavericks but don’t install.

Attach your USB stick/drive.

Launch the Terminal from /Applications/Utilities and enter the command below and then your password when prompted, be sure to change the ‘Untitled‘ name in the below command to your external disk name:

Let it do its thing and there you have it, one bootable Mac OSX 9 drive.

This really is a super simple way – however if using the Terminal fills you with fear and dread, there are some GUI apps that can get the job done namely DiskMakerX and a new imaging tool that can clone a new disk very quickly – AutoDMG.

Alternative Ways of building a Bootable Mavericks OSX Disk.

To make a boot disk of OSX 10.9 Mavericks, first of all get the app or download via the App store, if downloaded it will file in the folder Applications.

Control / Left click Options, Show in Finder to get to the app, don’t install at this stage.

Located in the Applications Folder

Finding the InstallESD.dmg

To find the actual InstallESD.dmg file, control/left click the ‘Install OS X Mavericks’ app and choose show contents – then navigate to Shared Support folder.

Control/Right click to show contents

Navigate to Shared Support folder to see the InstallESD.dmg file

Mount InstallESD.dmg

Double click to mount the image.

Make Invisible Files Visible

We need to see the BaseSystem.dmg inside the InstallESD.dmg

Crank open Terminal and run:

This will show all invisible files have a look inside the mounted InstallESD.dmg

Mount an External Disk

Create bootable disk for mac os

Attach a USB/external drive – this guide uses the external drive name calledBootDisk, you need to make sure the format is correct, it needs to be Mac OSX Extended Journaled – it its not you can format that in Disk Utility.

Launch Disk Utility

Launch Disk Utility as found in Applications/Utilities and go to the Restore tab.

Drag BaseSystem.dmg to the Source field and your external disk to the Destination and click Restore.

This will mount your new OSX 10.9 external disk and name it OSX Base System – but we need to add the packages.

Fix the Packages

Couple of things to fix in the newly created boot disk, remove the Packagealias at System/Installation/ folder

Now from the previously mounted InstallESD.dmg copy over the Packages folder to the same location where we just removed the alias above.

Will take a while as it holds all the install packages.

Job done now you can boot from the OSX 10.9 disk.

Make the Visible back to Invisible

If you want all to return back to normal and hide the system files run a couple more commands in the Terminal

How to make bootable mac os usb

How to create the OSX 10.9 Mavericks Bootable Drive just via Terminal

Just for the crazy ones……after Mavericks is downloaded….and again this assumes you external disk is named BootDisk

Mount the InstallESD.dmg buried deep in the app

Swap to the newly mounted image

This puts you back in the Finder in front of the newly mounted InstallESD.dmg, go back to Terminal and clone the BaseSystem.dmg to the remote USB drive

This will change ‘BootDisk‘ to ‘OS X Base System

Remove the existing Packages alias link from the newly restored image

Create Bootable Usb From Dmg Mac Mavericks 2

Copy the full OSX Mavericks Packages over to the new image….takes a while

And there it is! – to eject the new bootable USB OSX Mavericks 10.9 disk ‘cd’ to home and eject

Create Bootable Usb From Dmg Mac Mavericks 2

Now you can boot up from your newly bootable disk and either Install OSX10.9 on another device or use the Terminal/Disk Utility or Firmware Password Utilities on another device.