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How to Create macOS Sequoia Bootable USB

This guide describes creating macOS Sequoia Bootable USB on your Mac. The installation has been covered in another section. You can use this USB for a clean install of macOS Sequoia on your compatible Mac.

Before you start with this guide, here are a few requirements
  • A working Internet connection.
  • A 16 GB or larger USB Flash Drive.
  • macOS Sequoia compatible Mac. See macOS Sequoia compatibility for more information.
  • A complete backup of your system.
To start with the guide, you'll also need to have access to a fully functional computer running macOS Mojave or later.

STEP 1: Download macOS Sequoia
The very first step is to download macOS Sequoia. A copy of macOS is currently available to developers who have enrolled in the Apple Developer Program. If you have still not enrolled in the program, there's still a way to it which has been discussed later in this guide. To download macOS Sequoia, follow the steps below

Using a Developer Account:
1. If you're using macOS Mojave or later, you can obtain macOS Sequoia via your developer account. Sign in to your Apple Developer Account.
2. From the left pane, click on Downloads.
3. Scroll down and under Overview, select macOS.
4. Under macOS Beta Software, use the link to download macOS Developer Beta Access Utility.
5. Open the macOS Developer Beta AccessUtility.dmg and install the package file.
6. A software update popup will open in System Preferences. Click on Upgrade Now to download the 15GB installer.

Without a Developer Account:
If you do not have a Developer Account, use the guide linked below to download macOS Sequoia

STEP 2: Creating a Bootable USB Flash Drive
The next step is to create a bootable installation drive. Follow the steps below to create the installation media.

1. Insert your USB Flash Drive
2. Open Disk Utility. The Disk Utility is located at /Applications/Utilities.
3. Click on View and then select Show All Devices.
Screenshot 2023-06-01 at 10.35.30 AM-min.png

4. Select your USB Flash Drive in the left pane and click on Erase button. A popup will appear asking you to erase the drive. Use the following parameters to erase your drive:

Name: USB
Format: Mac OS Extended (Journaled)
Scheme: GUID Partition Map
Screenshot 2023-05-19 at 7.35.38 AM-min.png

NOTE: Do NOT use any other format other than Mac OS Extended (Journaled) to erase the USB.

5. Once erased, click on Done and close Disk Utility. You can click on Show Details to verify if the USB has been erased with HFS+ format.
Screenshot 2023-05-19 at 7.36.03 AM-min.png

6. Launch Terminal, located at /Applications/Utilities.
7. Execute the createinstallmedia command given below in Terminal.

Code:
sudo /Applications/Install\ macOS\ 15\ beta.app/Contents/Resources/createinstallmedia --volume /Volumes/USB

8. When prompted, enter your password.
Screenshot 2024-06-10 at 1.09.37 PM-min.png
9. Press (Y) to confirm and then press enter key. The terminal will start erasing the disk and will create a macOS Bootable USB.
Screenshot 2024-06-10 at 1.09.56 PM-min.png Screenshot 2024-06-10 at 1.09.59 PM-min.png
If you're on Big Sur or later, the Terminal may prompt for access. When prompted, click on OK to allow access.
Screenshot 2023-06-05 at 1.31.30 PM-min.png

Once the process is completed, you'll see the following screen:
Screenshot 2024-06-10 at 1.31.31 PM-min.png
10. Quit Terminal. The USB Flash Drive will be renamed as Install macOS 15 beta.
Screenshot 2024-06-10 at 1.33.45 PM-min.png

Now you can use this Bootable USB to perform a clean install of macOS Sequoia on your Mac!

QUICK NOTE:
  • macOS Sequoia Installer must exist in the Applications folder.
  • createinstallmedia is supported by OS X Mavericks and newer only.

If you're looking for a clean installation guide, you can follow the guide below.
 
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