Dec 16, 2019  Use the 'createinstallmedia' command in Terminal. 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. Choose your language, if prompted. Jan 19, 2018  To install macOS or OS X from USB, you need to create a bootable install USB drive for Mac operating system. This tutorial will introduce you three ways to create bootable USB drive for macOS High Sierra, macOS Sierra, Mac OS X El Capitan, Yosemite, Mavericks and more. If you are in the process to install macOS Sierra 10.12 on your PC or Hackintosh, the first step is to create a bootable USB installer for macOS Sierra to install Mac OS from it on your PC, you can create bootable USB Installer with UniBeast, but still, you need a Macintosh to download and create macOS Sierra bootable USB Installer.

As you know, Apple releases a new OS X operating system every year, and the new OS X can only be downloaded via the Mac App Store (currently OS X Yosemite). The older versions of OS X are still supported by Apple, but it should be more difficult to download. My following tip can help you easily download and create USB installer for OS X – Yosemite, Mavericks, Mountain Lion, and Lion.

Before doing, you need to prepare 2 things:

• An USB – at least 8Gb or higher.
• A MacBook to run Disk Utility in OS X.

How to create USB installer for Mac OS X

Step 1: Download installer of OS X Yosemite, Mavericks, Mountain Lion, and Lion

We are still able to download Yosemite from Apple store:

Go to Mac Apple Store > use your Apple ID and login > Find and download OS X Yosemite. After downloading, OS X Yosemite Installerwill appear in /Applications. To get the InstallESD.DMG, go to Application > right mouse on OS X Yosemite > select “Show Package Contents“.

OS X – Mavericks, Mountain Lion, and Lion can be downloaded through Torrent method:

Firstly, Get μTorrent or Folx Pro (Folx Pro 3 full version download), then use following torrent file to download the OS X version you desire.

• Download OS X Lion 10.7.5 (4,3 GB) – Torrent.
• Download OS X Mountain Lion 10.8.5 (4,1 GB)- Torrent.
• Download OS X Mavericks 10.9.5 (4,9 GB)- Torrent.
• Download OS X Yosemite 10.10.2 (5,3 GB)- Torrent.

Step 2: Format and make USB bootable

1. Plug USB into Macbook and run Disk Utility > Select the USB drive in the left side > Click on Erase > Choose Mac OS Extended (Journaled) format > Apply.
2. Go to Partition tab > Select 1 Partition at Partition Layout.
3. Change the name to Untitled 1 from Untitled > Click on Option.

5. Choose GUID Partition Table and click OK.

6. Click on Apply to format USB > End the Disk Utility when the process is completed.

Step 3: Make USB OS X installer

Run OS X installer.DMG download in step 1 to mount it’s virtual hard drive into system > Launch Disk Utility, select the right USB in the left side > Click pn Restore > Drag and drop OS X installer.DMG into Source > Drag and drop USB into Destination > Click on Restore button.

After the restore process is completed, we have obtained the USB stick containing the installer of OS X Lion, Mountain Lion, Mavericks, or Yosemite at your choice.

Notice: Once the USB stick should only contain one OS X installer version. You should have several USB stick if you want to create many installers.

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.

Osx Dmg Install

Download macOS

Find the appropriate download link in the upgrade instructions for each macOS version:

• macOS Catalina, macOS Mojave, and macOS High Sierra 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.
  To get the required 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.
• macOS Sierra downloads as a disk image that contains a file named InstallOS.pkg. Open this file and follow the onscreen instructions. It installs an app named Install macOS Sierra into your Applications folder.
• OS X El Capitan downloads as a disk image that contains a file named InstallMacOSX.pkg. Open this file and follow the onscreen instructions. It installs an app named Install OS X El Capitan into your Applications folder.

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.
   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 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 commands for Sierra and 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:

Catalina:

Mojave:

Create Dmg From Osx Installer Windows 7

High Sierra:

Dmg Installer For Windows

Create Dmg Mac

Sierra:

El Capitan: