Are you planning to install or upgrade macOS on your Mac computer? Creating a bootable installation program can be extremely useful, especially if you want to perform a fresh installation or install macOS on multiple devices. In this step-by-step guide, we will walk you through the process of creating a bootable installation program for macOS.

Gather the prerequisites

Before you begin, make sure you have the following prerequisites:

  • A USB flash drive (16GB or larger) to create the bootable installer
  • A Mac computer with an active internet connection
  • A copy of the macOS installation file from the App Store or Apple Developer Program

Format the USB flash drive

To create a bootable installation program, you need to format the USB flash drive with the appropriate file system:

  1. Insert the USB flash drive into your Mac computer
  2. Open the “Disk Utility” application from the “Applications” folder
  3. Select your USB flash drive from the list of available drives
  4. Click on the “Erase” option
  5. Choose a suitable name for the drive
  6. Select “Mac OS Extended (Journaled)” as the format
  7. Click “Erase” to format the USB flash drive

Create the bootable installer

Once you have a formatted USB flash drive, you can proceed to create the bootable installer:

  1. Open the “Terminal” application from the “Applications” folder
  2. Copy and paste the following command into the Terminal window:
    sudo /Applications/Install\ macOS\ [macOS name].app/Contents/Resources/createinstallmedia --volume /Volumes/[USB drive name]
  3. Replace “[macOS name]” with the exact name of the macOS installation file
  4. Replace “[USB drive name]” with the name you assigned to the USB flash drive during formatting
  5. Press Enter and enter your administrator password
  6. Wait for the process to complete, as it may take some time depending on the size of the macOS installation file
  7. Once finished, you will have a bootable installation program for macOS on your USB flash drive

Using the bootable installer

Now that you have a bootable installer for macOS, you can use it to perform installations or upgrades:

  1. Insert the bootable USB flash drive into the Mac computer you want to install macOS on
  2. Restart the computer and hold down the Option (⌥) key when you hear the startup sound
  3. Select the bootable installer from the list of startup disks
  4. Follow the on-screen prompts to complete the installation or upgrade of macOS

And there you have it! By following this step-by-step guide, you can easily create a bootable installation program for macOS. This can help you perform clean installations, troubleshoot issues, or install macOS on multiple devices without the need for repeated downloads. Remember to always create a backup of your important data before performing any installations or upgrades. Happy installing!

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