Installing Mac OS from USB can be a lifesaver when your Mac system crashes. It is a straightforward process that can be done with just a few clicks. In this article, we will guide you through the steps on how to install Mac OS from USB.

, in this article we will be discussing how to install Mac OS from a USB. Many Mac users prefer to install the operating system using a USB as it is a faster and more convenient method compared to using a CD or DVD. We will guide you through the step-by-step process of creating a bootable USB and installing Mac OS on your Mac device. Let’s get started!

Preparing the USB Installer

To install Mac OS from USB, you will need a USB flash drive with at least 16GB of space, and the latest version of the Mac operating system installer. Here are the steps to prepare the USB installer:

  1. Connect the USB flash drive to your Mac.
  2. Open the Disk Utility app.
  3. Select the USB flash drive from the sidebar.
  4. Click on the “Erase” button and choose “Mac OS Extended (Journaled)” as the format.
  5. Give it a name and click on “Erase” to format the USB drive.
  6. Download the latest version of the Mac operating system from the App Store.
  7. Once the download is complete, the installer will launch automatically.
  8. Close the installer and locate the “Install macOS” file in the Applications folder.

Creating the Bootable USB Installer

Now that you have the “Install macOS” file, you can create a bootable USB installer using the Terminal app. Follow these steps:

  1. Open the Terminal app.
  2. Type in “sudo /Applications/Install\ macOS\ [version].app/Contents/Resources/createinstallmedia –volume /Volumes/[USB drive name] –applicationpath /Applications/Install\ macOS\ [version].app”.
  3. Replace “[version]” with the name of the Mac operating system you downloaded.
  4. Replace “[USB drive name]” with the name you gave your USB flash drive.
  5. Press “Enter” and wait for the process to complete.

Installing Mac OS from USB

Once you have created the bootable USB installer, you can use it to install Mac OS on your Mac. Follow these steps:

  1. Insert the USB flash drive into your Mac.
  2. Restart your Mac and hold down the “Option” key.
  3. Select the USB installer from the list of startup disks and click “Enter”.
  4. Once the installer loads, select your language and click “Continue”.
  5. Agree to the terms and conditions and click “Continue”.
  6. Select the destination disk where you want to install Mac OS and click “Continue”.
  7. Click “Install” and wait for the installation process to complete.

Troubleshooting

If you encounter any issues during the installation process, here are some troubleshooting steps you can try:

  1. Make sure that your Mac meets the system requirements for the version of Mac OS you are installing.
  2. Check that the USB flash drive is properly formatted and has enough space.
  3. Restart your Mac and try the installation process again.
  4. If you are still unable to install Mac OS from USB, you may need to contact Apple Support for assistance.

Creating a Bootable USB Installer on Windows

If you do not have access to a Mac to create a bootable USB installer, you can still create one on a Windows PC using a third-party app called TransMac. Here are the steps:

  1. Download and install TransMac on your Windows PC.
  2. Insert the USB flash drive into your PC.
  3. Open TransMac and right-click on the USB flash drive.
  4. Select “Format Disk for Mac” and click “Yes”.
  5. Once the format is complete, right-click on the USB flash drive again and select “Restore with Disk Image”.
  6. Browse for the “Install macOS” file and click “OK”.
  7. Wait for the process to complete.

FAQs for how to install mac os from usb

What do I need to install Mac OS from a USB drive?

To install Mac OS from a USB drive, you will need a Mac computer, a USB drive with at least 8GB of storage space, and a copy of the Mac OS installation file. Depending on the version of Mac OS you want to install, you may also need an internet connection to download additional files during the installation process.

How do I create a bootable USB drive for Mac OS installation?

To create a bootable USB drive for Mac OS installation, you will need the Mac OS installation file and a program like Disk Utility or Terminal to create the bootable drive. First, format your USB drive with the Mac OS Extended (Journaled) file system. Then, use Disk Utility or Terminal to create a bootable installer on the USB drive by selecting the installation file and specifying the USB drive as the destination. Once the process is complete, you can use the USB drive to install Mac OS on a compatible Mac computer.

Can I install Mac OS from a USB drive on multiple computers?

Yes, you can use a USB drive with a bootable Mac OS installer to install Mac OS on multiple compatible Mac computers. However, you will need to download the Mac OS installation file for each computer you want to install Mac OS on, and you may need to create a separate bootable USB drive for each installation.

What should I do if my Mac computer won’t boot from the USB drive?

If your Mac computer won’t boot from the USB drive, you may need to change the boot settings in the startup menu. Restart your Mac and hold down the Option (or Alt) key to access the startup menu. Select the USB drive with the Mac OS installer and press Enter to boot from the USB drive. If this doesn’t work, you may need to check that your USB drive is formatted correctly and that the Mac OS installation file is not corrupted.

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