How to Create a Bootable USB for macOS 13

Creating a bootable USB installer for macOS 13 (Ventura) allows you to perform clean installations, troubleshoot problematic systems, or install the operating system on multiple Macs without re-downloading the installer. This guide outlines the complete process, including downloading the official macOS Ventura installer, formatting your flash drive properly using Disk Utility, and executing the native Apple terminal command to write the installation files to the drive.

Requirements

  • A USB flash drive with at least 16 GB of storage capacity.
  • A Mac compatible with macOS 13 Ventura.
  • An administrator account on the Mac.

Step 1: Download macOS 13 Ventura

  1. Open the App Store on your Mac.
  2. Search for macOS Ventura and click Get or Download.
  3. When the download completes, the installer will automatically launch. Do not click "Continue" to install it; instead, press Command + Q to quit the installer.
  4. Verify that the file named Install macOS Ventura is present in your /Applications folder.

Step 2: Format the USB Drive

Note: This process completely erases all data on the USB drive.

  1. Connect the USB drive to your Mac.
  2. Open Disk Utility (located in /Applications/Utilities).
  3. Click View in the top menu and select Show All Devices.
  4. Select the top-level entry for your USB drive from the left sidebar and click Erase.
  5. Set the parameters as follows:
    • Name: MyVolume (You can change this, but using MyVolume matches the default Apple command).
    • Format: Mac OS Extended (Journaled)
    • Scheme: GUID Partition Map
  6. Click Erase, wait for the process to complete, then click Done.

Step 3: Use Terminal to Create the Installer

  1. Open Terminal (located in /Applications/Utilities).
  2. Paste the following command into the Terminal window:
sudo /Applications/Install\ macOS\ Ventura.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
  1. Press Return.
  2. Type your Mac's administrator password when prompted (the characters will not appear on the screen) and press Return.
  3. When prompted to erase the volume, type Y and press Return.
  4. If a prompt appears asking for permission to access files on a removable volume, click OK.
  5. Terminal will display the progress. Once finished, the terminal will report "Install media now available at /Volumes/Install macOS Ventura". You may now close Terminal.

Step 4: Boot from the USB Installer

For Apple Silicon Macs (M1, M2, M3):

  1. Shut down your Mac.
  2. Insert the bootable USB drive.
  3. Press and hold the power button until you see "Loading startup options".
  4. Select the volume containing the macOS 13 installer and click Continue.

For Intel-based Macs:

  1. Shut down your Mac.
  2. Insert the bootable USB drive.
  3. Turn on the Mac and immediately press and hold the Option (Alt) key.
  4. Release the key when you see a dark screen showing your bootable volumes.
  5. Select the drive containing the macOS 13 installer and press Return.