Making A Dmg Into Bootable Usb

Apple delivers the macOS installer and applications through the app store since the launch of OS X Lion. The macOS installer has a .app extension when you get it through the official channel. Unlike the macOS DMG installer, which Apple doesn’t provide nowadays, the app version of the macOS install package is not bootable. Hence it is not mountable nor compatible with operating systems like Windows. For some reason, if you want macOS in .DMG or .ISO format, there is a method to convert the .app file. Unfortunately you need a macOS system to convert .app to .dmg to .iso image.

Reasons for converting macOS Mojave or High Sierra .app to .DMG or .ISO

  • The macOS in DMG format let to quickly create Install DVDs and bootable USB installers in a few minutes.
  • When you convert macOS Install .app to ISO format, you may use it for running macOS on Windows PCs (Hackintosh).
  • You can use the DMG file made from the macOS Install app for creating a boot-friendly macOS USB on Windows PC.

Method 2: How to Burn DMG to USB in Windows 10 (Bootable) Since Windows doesn't natively support DMG files, you will need to first download and install a utility that can handle such disk images. The best software for the job is WizDMG, a Windows-based desktop solution for authoring Apple's disk image files in a non-Mac environment. Having a bootable USB is very essential, especially if you want to finish installing Windows faster. Using a bootable USB to install an operating system (OS) not only makes the installation faster, but also saves a DVD! Creating or using a USB drive to install Windows operating systems is very easy if you follow the steps mentioned below.

  1. Part 3: Create Bootable USB from DMG in Windows Via PowerISO Step 1.: Download PowerISO and install it in your Windows PC. Step 2.: You can import the DMG file directly by clicking on ‘Burn' in. Step 3.:Now review the settings to select the burn speed. Step 4.: Now click on 'Burn' and wait.
  2. Sep 23, 2019  Use the Restore Disk Image to Drive dialog box to browse for the DMG file with the installation files for Mac OS X Yosemite in this case, and click the OK button to create a bootable USB of the operating system.
  3. Aug 17, 2011  Transmac for Windows (2-week trial) can format USB drives for mac and restore.dmg files to USB drives. Download Transmac and install in Windows. In the right-side panel of Transmac, right click on your USB Drive Format Disk Format with Disk Image (see attached screenshot) Point to your.dmg file and click Open.
  4. Step1: Create Bootable USB Drive. Start PowerISO (v6.5 or newer version, download here). Insert the USB drive you intend to boot from. Choose the menu 'Tools Create Bootable USB Drive'. The 'Create Bootable USB Drive' dialog will popup. If you are using Windows Vista or above operating system, you need confirm the UAC dialog to continue.
  5. How to make a Mac OS X bootable USB installation media. In the warning dialog box, click Yes. Use the Restore Disk Image to Drive dialog box to browse for the DMG file with the installation files for Mac OS X Yosemite in this case, and click OK to create a bootable USB of the operating system.

Above all, DMG and ISO files are highly portable; it is easy for anyone to upload and transfer them through the Internet.

Convert macOS Installer .APP to .DMG bootable image

The requirement for running macOS, and a USB Pen Drive for converting the Installer application to bootable ISO or DMG image. The step by step process for converting macOS Mojave, High Sierra, Sierra, EI Capitan to the bootable .DMG or .ISO is explained below.

  1. First of all, download the full Mac OS installer, and save it in the Applications folder.
  2. Next step is to create a bootable USB installer from macOSÂ Install app. I prefer using the macOS Terminal app to create the bootable USB Installer using commands in the screenshots.
  3. Now, copy the contents of the macOS USB to a new folder and give it a single word name. We are going to make DMG file on Mac from the newly created folder.
  4. Then open the Disk Utility app and then take the “File” menu from the top left corner. Then New Image and Image from folder, and direct the Finder to the macOS file folder.
  5. Choose the image format as Hybrid (HFS+/ISO/UDF).
  6. The system now starts converting the macOS installer .app bootable .DMG file.
The output is a boot-friendly DMG image which you could restore to a USB or DVD drive from Windows or macOS. It is also possible to burn this DMG file to a DVD or USB Pen Drive from Windows PCs using software like Transmac.

Just in case you find any difficulty, check our video on converting macOS .app to bootable .dmg.

How to convert macOS installer to iso format

There are several ways to convert macOS .app to .ISO bootable image. Usually one need to do APP to DMG or CDR conversion before making it an ISO file on Mac. The Disk Utility app in macOS previously had an option that allows you to convert DMG to ISO/CDR. You can use Terminal and third-party apps to convert Mac OS installer to ISO if it is in CDR format.

AnyToISO app capable of converting macOS DMG to iso format. The free version of AnyToISO doesn’t support converting dmg files above 850 MB. Hence, you need to either purchase or download (Search AnyToISO Pro 3.9.0 in Google) the PRO version of this app.

In my experience, converting DMG to ISO with AnytoISO takes a lot of space and resources if you’re on macOS machine. The system shows out of space notification even though you have enough space left in the disk. Therefore, it is better to transfer the DMG files to a Windows machine and use freeware like DMGtoISO or AnyBurn for converting. Check our page on burning DMG on windows for freeware tools supporting DMG to ISO conversion.

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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 install macOS, but it can be useful when you want to install on multiple computers without downloading the installer each time.

Download macOS

Burn Dmg To Usb Bootable

Download a macOS installer.* You can find the appropriate download link in the upgrade instructions for macOS Catalina, macOS Mojave, macOS High Sierra, macOS Sierra, and OS X El Capitan.

  • If the macOS installer opens after downloading, quit it without continuing installation.
  • macOS Sierra and El Capitan download as a disk image that contains an installer named InstallOS.pkg or InstallMacOSX.pkg. Run this installer before continuing.
  • If downloading macOS Catalina, macOS Mojave, or macOS High Sierra for the purpose of creating a bootable installer, your Mac must be 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.

Then find the installer in your Applications folder as a single ”Install” file, such as Install macOS Catalina.

Use the 'createinstallmedia' command in Terminal

  1. Connect the USB flash drive or other volume 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.
    Catalina:*
    Mojave:*

    High Sierra:*
    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 Mojave. 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 commands for Sierra and El Capitan.

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Bootable

Use the bootable installer

Make bootable usb with transmac

After creating the bootable installer, follow these steps to use it.

  1. Connect the bootable installer to 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

Making A Dmg Into Bootable Usb 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:

Catalina:

Mojave:

Software For Making Bootable Usb

High Sierra:

Sierra:

El Capitan: