How to Download and Install macOS Sequoia 15 Beta [Full Guide]

When you're reading here, you may have a clear understanding of the new features in macOS 15 Sequoia and can't wait until this fall to try it out.

So, how can you download and install the macOS Sequoia beta if you don't have an Apple developer account?

Don't worry; this guide will walk you through the detailed steps to download and install the macOS Sequoia public beta and developer beta. Let's get started!

Before You Start

1. Check macOS Sequoia 15 Compatibility

Below is a list of Mac modes compatible with macOS 15 Sequoia.

• iMac: 2019 and later
• iMac Pro: 2017 and later
• Mac Studio: 2022
• MacBook Air: 2020 and later
• Mac Mini: 2018 and later
• MacBook Pro: 2018 and later
• Mac Pro: 2019 and later

2. Clear Enough Storage Space

The macOS 15 beta installer is approximately 15 GB. To ensure a smooth download and installation process, it is best to keep at least 35 GB of free storage space.

To check the available storage space on your Mac, click the Apple menu > System Settings > General > Storage.

If your Mac is running low on storage space, try BuhoCleaner. As the name suggests, BuhoCleaner is a cleaner that is specifically designed to remove unnecessary files from your Mac to keep your Mac clean and optimized.

Here's how to free up space on your Mac using BuhoCleaner:

1. Download, install, and launch BuhoCleaner.
2. Click the Scan button to flash clean your Mac. (The screenshot below shows how much space I cleared out.)

   

3. Move to App Uninstall to uninstall unwanted apps from your Mac. (Google Chrome took up over 5 GB of my storage space.)

   

4. To further clean up your Mac, explore features like Duplicates, Large Files, and Disk Space Analysis.

3. Back Up Your Mac

Whether you're upgrading or downgrading your Mac, it's recommended to create a backup of it first.

The official way to back up your Mac is by using Time Machine, a tool built into macOS. For detailed steps, refer to the related guide below.

Related Article: [Full Guide] How to Back Up a Mac with/without Time Machine

How to Download and Install macOS Sequoia 15 Public Beta

Step 1. Sign Up for the Apple Beta Program

1. Ensure that your Mac is running macOS Ventura 13.4 or later.
2. Sign up for the Apple Beta Program with your Apple ID.

Step 2. Download and Install macOS Sequoia 15 Public Beta

1. Click the Apple menu and select "System Settings" (or System Preferences on macOS Monterey or earlier).
2. Click "General" > "Software Update", and the system will automatically check the available updates, including beta versions.
3. Click the information icon next to "Beta updates".

   

4. Click Off, then select "macOS Sequoia Public Beta" from the drop-down menu and click "Done".

   

5. Click "Upgrade Now" to download the macOS Sequoia public beta.

   

6. Once the download is complete, click the "Install Now" button and follow the onscreen installation instructions.

How to Download and Install macOS Sequoia 15 Developer Beta

Step 1. Enroll in the Apple Developer Program

You need to register your Apple ID in the Apple Developer Program, otherwise, you will not be able to see the macOS Sequoia beta in Software Update.

Here's how:

1. Go to the Apple Developer website.
2. Click the Account button, then sign in with the Apple ID you use on your Mac.

Step 2. Download and Install macOS Sequoia Beta

1. Open the System Settings app on your Mac.
2. Click General > Software Update > Beta Updates.
3. Select macOS Sequoia Public Beta, then click Done.

   

4. When you see the beta version, click Upgrade Now to download it.

   

How to Download and Install macOS 15 Sequoia Beta Using InstallAssistant.pkg

If you wish to install macOS Sequoia on another APFS volume or an external hard drive, read on to learn how to get the full macOS Sequoia beta installer.

Step 1. Download macOS Sequoia Beta Installer

1. Click the download link below.

• Download macOS 15 Beta 4
• Download macOS 15 Public Beta 1
• Download macOS 15.0 Beta 3 - 24A5289g

2. Once the download is complete, open and run the downloaded "InstantAssistant.pkg" file.

   

3. In the Applications folder in Finder, you will find an app named "Install macOS Sequoia".

Step 2. Install macOS 15 Sequoia Beta

1. Open the Install macOS Sequoia app.
2. Click "Continue" > "Agree".
3. Select the disk you want to install macOS 15 Sequoia.
4. Select a user if required, then click "Install".
5. Wait for the installation process to complete.

Related Article: [Full Guide] How to Install macOS on an External Drive

The Bottome Line

By following the steps above, you should have successfully installed macOS Sequoia 15 beta on your Mac.

macOS Sequoia is still in beta, which means you may encounter many unexpected problems. If you are disappointed with the new version of macOS and want to downgrade it to an earlier version, see how to downgrade macOS.