Skip to main content

How to download and install macOS Catalina 10.15.6 beta 4 to your Mac

How to download and install macOS 10.15 developer beta 1 to your Mac
How to download and install macOS 10.15 developer beta 1 to your Mac (Image credit: iMore)

macOS Catalina 10.15.6 will be arriving soon with new features that need testing before they're launched to the public. As usual, Apple is providing an early version of this macOS release to developers so that they can test their apps against it and prepare for its release to Mac owners.

What's new in the macOS Catalina beta?

July 9, 2020: Apple releases macOS Catalina 10.15.6 beta 4 for developers

Apple has just released macOS Catalina 10.15.6 beta 4 for developers. Follow the instructions below to get started with the macOS 10.15.6 beta. If you've been waiting for macOS 10.15.6 to start testing with macOS, now's the time to start downloading.

June 30, 2020: Apple releases macOS Catalina 10.15.6 beta 3 for developers

Apple has just released macOS Catalina 10.15.6 beta 3 for developers. Follow the instructions below to get started with the macOS 10.15.6 beta. If you've been waiting for macOS 10.15.6 to start testing with macOS, now's the time to start downloading.

June 9, 2020: Apple releases macOS Catalina 10.15.6 beta 2 for developers

Apple has just released macOS Catalina 10.15.6 beta 2 for developers. Follow the instructions below to get started with the macOS 10.15.6 beta. If you've been waiting for macOS 10.15.6 to start testing with macOS, now's the time to start downloading.

June 1, 2020: Apple releases macOS Catalina 10.15.6 beta 1 for developers

Apple has just released macOS Catalina 10.15.6 beta 1 for developers. Follow the instructions below to get started with the macOS 10.15.6 beta. If you've been waiting for macOS 10.15.6 to start testing with macOS, now's the time to start downloading.

May 20, 2020: Apple releases macOS Catalina 10.15.5 beta 5 for developers

Apple has just released macOS Catalina 10.15.5 beta 5 for developers. Follow the instructions below to get started with the macOS 10.15.5 beta. If you've been waiting for macOS 10.15.5 to start testing with macOS, now's the time to start downloading.

May 6, 2020: Apple releases macOS Catalina 10.15.5 beta 4 for developers

Apple has just released macOS Catalina 10.15.5 beta 4 for developers. Follow the instructions below to get started with the macOS 10.15.5 beta. If you've been waiting for macOS 10.15.5 to start testing with macOS, now's the time to start downloading.

April 29, 2020: Apple releases macOS Catalina 10.15.5 beta 3 for developers

Apple has just released macOS Catalina 10.15.5 beta 3 for developers. Follow the instructions below to get started with the macOS 10.15.5 beta. If you've been waiting for macOS 10.15.5 to start testing with macOS, now's the time to start downloading.

April 16, 2020: Apple releases macOS Catalina 10.15.5 beta 2 for developers

Apple has just released macOS Catalina 10.15.5 beta 2 for developers. Follow the instructions below to get started with the macOS 10.15.5 beta. If you've been waiting for macOS 10.15.5 to start testing with macOS, now's the time to start downloading.

March 31, 2020: Apple releases macOS Catalina 10.15.5 beta 1 for developers

Apple has just released macOS Catalina 10.15.5 beta 1 for developers. Follow the instructions below to get started with the macOS 10.15.5 beta. If you've been waiting for macOS 10.15.5 to start testing with macOS, now's the time to start downloading.

March 18, 2020: Apple releases macOS Catalina 10.15.4 beta 6 for developers

Apple has just released macOS Catalina 10.15.4 beta 6 for developers. Follow the instructions below to get started with the macOS 10.15.4 beta. If you've been waiting for macOS 10.15.4 to start testing with macOS, now's the time to start downloading.

March 10, 2020: Apple releases macOS Catalina 10.15.4 beta 5 for developers

Apple has just released macOS Catalina 10.15.4 beta 5 for developers. Follow the instructions below to get started with the macOS 10.15.4 beta. If you've been waiting for macOS 10.15.4 to start testing with macOS, now's the time to start downloading.

March 3, 2020: Apple releases macOS Catalina 10.15.4 beta 4 for developers

Apple has just released macOS Catalina 10.15.4 beta 4 for developers. Follow the instructions below to get started with the macOS 10.15.4 beta. If you've been waiting for macOS 10.15.4 to start testing with macOS, now's the time to start downloading.

February 26, 2020: Apple releases macOS Catalina 10.15.4 beta 3 for developers

Apple has just released macOS Catalina 10.15.4 beta 3 for developers. Follow the instructions below to get started with the macOS 10.15.4 beta. If you've been waiting for macOS 10.15.4 to start testing with macOS, now's the time to start downloading.

February 19, 2020: Apple releases macOS Catalina 10.15.4 beta 2 for developers

Apple has just released macOS Catalina 10.15.4 beta 2 for developers. Follow the instructions below to get started with the macOS 10.15.4 beta. If you've been waiting for macOS 10.15.4 to start testing with macOS, now's the time to start downloading.

February 5, 2020: Apple releases macOS Catalina 10.15.4 beta 1 for developers

Apple has just released macOS Catalina 10.15.4 beta 1 for developers. Follow the instructions below to get started with the macOS 10.15.4 beta. If you've been waiting for macOS 10.15.4 to start testing with macOS, now's the time to start downloading.

January 24, 2020: Apple releases macOS Catalina 10.15.3 beta 3 for developers

Apple has just released macOS Catalina 10.15.3 beta 3 for developers. Follow the instructions below to get started with the macOS 10.15.3 beta. If you've been waiting for macOS 10.15.2 to start testing with macOS, now's the time to start downloading.

January 14, 2020: Apple releases macOS Catalina 10.15.3 beta 2 for developers

Apple has just released macOS Catalina 10.15.3 beta 2 for developers. Follow the instructions below to get started with the macOS 10.15.3 beta. If you've been waiting for macOS 10.15.2 to start testing with macOS, now's the time to start downloading.

December 17, 2019: Apple releases macOS Catalina 10.15.3 beta 1 for developers

Apple has just released macOS Catalina 10.15.3 beta 1 for developers. Follow the instructions below to get started with the macOS 10.15.3 beta. If you've been waiting for macOS 10.15.2 to start testing with macOS, now's the time to start downloading.

December 6, 2019: Apple releases macOS Catalina 10.15.2 beta 4 for developers

Apple has just released macOS Catalina 10.15.2 beta 4 for developers. Follow the instructions below to get started with the macOS 10.15 beta. If you've been waiting for macOS 10.15.2 to start testing with macOS, now's the time to start downloading.

November 20, 2019: Apple releases macOS Catalina 10.15.2 beta 3 for developers

Apple has just released macOS Catalina 10.15.2 beta 3 for developers. Follow the instructions below to get started with the macOS 10.15 beta. If you've been waiting for macOS 10.15.2 to start testing with macOS, now's the time to start downloading.

November 13, 2019: Apple releases macOS Catalina 10.15.2 beta 2 for developers

Apple has just released macOS Catalina 10.15.2 beta 2 for developers. Follow the instructions below to get started with the macOS 10.15 beta. If you've been waiting for macOS 10.15.2 to start testing with macOS, now's the time to start downloading.

November 7, 2019: Apple releases macOS Catalina 10.15.2 beta 1 for developers

Apple has just released macOS Catalina 10.15.2 beta 1 for developers. Follow the instructions below to get started with the macOS 10.15 beta. If you've been waiting for macOS 10.15 to start testing with macOS, now's the time to start downloading.

October 24, 2019: Apple releases macOS Catalina 10.15.1 beta 3 for developers

Apple has just released macOS Catalina 10.15.1 beta 3 for developers. Follow the instructions below to get started with the macOS 10.15 beta. If you've been waiting for macOS 10.15 to start testing with macOS, now's the time to start downloading.

October 17, 2019: Apple releases macOS Catalina 10.15.1 beta 2 for developers

Apple has just released macOS Catalina 10.15.1 beta 2 for developers. Follow the instructions below to get started with the macOS 10.15 beta. If you've been waiting for macOS 10.15 to start testing with macOS, now's the time to start downloading.

October 11, 2019: Apple releases macOS Catalina 10.15.1 beta 1 for developers

Apple has just released macOS Catalina 10.15.1 beta 1 for developers. Follow the instructions below to get started with the macOS 10.15 beta. If you've been waiting for macOS 10.15 to start testing with macOS, now's the time to start downloading.

October 3, 2019: Apple releases macOS Catalina Golden Master for developers

Apple has just released the macOS Catalina Golden Master for developers. Follow the instructions below to get started with the macOS 10.15 beta. If you've been waiting for macOS 10.15 to start testing with macOS, now's the time to start downloading.

September 30, 2019: Apple releases macOS Catalina beta 10 for developers

Apple has just released macOS Catalina beta 10 for developers. Follow the instructions below to get started with the macOS 10.15 beta. If you've been waiting for macOS 10.15 to start testing with macOS, now's the time to start downloading.

September 23, 2019: Apple releases macOS Catalina beta 9 for developers

Apple has just released macOS Catalina beta 9 for developers. Follow the instructions below to get started with the macOS 10.15 beta. If you've been waiting for macOS 10.15 to start testing with macOS, now's the time to start downloading.

September 10, 2019: Apple releases macOS Catalina beta 8 for developers

Apple has just released macOS Catalina beta 8 for developers. Follow the instructions below to get started with the macOS 10.15 beta. If you've been waiting for macOS 10.15 to start testing with macOS, now's the time to start downloading.

August 28, 2019: Apple releases macOS Catalina beta 7 for developers

Apple has just released macOS Catalina beta 7 for developers. Follow the instructions below to get started with the macOS 10.15 beta. If you've been waiting for macOS 10.15 to start testing with macOS, now's the time to start downloading.

August 19, 2019: Apple releases macOS Catalina beta 6 for developers

Apple has just released macOS Catalina beta 6 for developers. Follow the instructions below to get started with the macOS 10.15 beta. If you've been waiting for macOS 10.15 to start testing with macOS, now's the time to start downloading.

July 31, 2019: Apple releases macOS Catalina beta 5 for developers

Apple has just released macOS Catalina beta 5 for developers. Follow the instructions below to get started with the macOS 10.15 beta. If you've been waiting for macOS 10.15 to start testing with macOS, now's the time to start downloading.

July 16, 2019: Apple releases macOS Catalina beta 4 for developers

Apple has just released macOS Catalina beta 4 for developers. Follow the instructions below to get started with the macOS 10.15 beta. If you've been waiting for macOS 10.15 to start testing with macOS, now's the time to start downloading.

July 2, 2019: Apple releases macOS Catalina beta 3 for developers

Apple has just released macOS Catalina beta 3 for developers. Follow the instructions below to get started with the macOS 10.15 beta. If you've been waiting for macOS 10.15 to start testing with macOS, now's the time to start downloading.

June 17, 2019: Apple releases macOS Catalina beta 2 for developers

Apple has just released macOS Catalina beta 2 for developers. Follow the instructions below to get started with the macOS 10.15 beta. If you've been waiting for macOS 10.15 to start testing with macOS, now's the time to start downloading.

June 3, 2019: Apple releases macOS Catalina beta 1 for developers

Apple has just released macOS Catalina beta 1 for developers. Follow the instructions below to get started with the macOS 10.15 beta. If you've been waiting for macOS 10.15 to start testing with macOS, now's the time to start downloading.

How to make an archived backup of your Mac with Time Machine

Before you begin, make sure you back up your Mac. The download and installation process is fairly easy, but any time you make significant changes to your computer, you risk problems. When it comes to securing your data, it is definitely better to be safe than sorry. Even if you just backed everything up the night before, make sure your Mac is completely up-to-date.

  1. Connect an external hard disk or Time Capsule with a USB, FireWire, or Thunderbolt cable.
  2. Click on the Apple icon () in the upper left corner of your screen.
  3. Select System Preferences... from the dropdown menu.
  4. Select Time Machine in the System Preferences window.

  1. Turn the Time Machine slider On.
  2. Click Select Backup Disk and choose the disk you'd like to use. Time Machine will format the hard drive for backups and start within two minutes.

How to download the macOS Catalina developer beta

Downloading the latest beta on your Mac is as simple as visiting Apple's developer portal.

  1. Visit developer.apple.com (opens in new tab) on your Mac.
  2. Click on the Dicover (opens in new tab) tab.
  3. Click on the macOS (opens in new tab) tab.
  4. Click Download.
  5. Log in with your developer account if prompted to do so.
  6. Scroll down and click on the Install Profile button for macOS Catalina 10.15. The file will automatically download to your Mac.
  7. Open your Downloads window and select macOS Catalina Developer Beta Access Utility.
  8. Double-click macOSDeveloperBetaAccessUtility.pkg to run the installer.

When the installer is finished downloading, System Preferences will automatically check for an update to macOS. Click Update to download and install the developer beta software. After the software has been downloaded, the installation process will begin as normal.

If the latest developer beta does not appear on the Updates list, restart your Mac. Then, open the Mac App Store and click the Updates tab.

The developer beta update can take a long time to finish downloading, depending on the size. You can check the status in the Updates tab of the Mac App Store.

How to install the macOS Catalina developer beta

After macOS Catalina is finished downloading, you will be prompted to install the software automatically.

  1. Click on Continue.
  2. Agree to Apple's Terms and Conditions.
  3. Click on Install.
  4. Follow the instructions to install macOS Catalina.

Your Mac will reboot to install macOS Catalina. You'll see a black screen with the Apple Logo and a progress bar. Grab a cup of coffee while you wait for the software to finish installing.

How to install the macOS Catalina beta on a partition

To keep your Mac's data from getting corrupted by a beta operating system, you can partition your Mac's hard drive to run macOS Catalina in tandem with your current operating system.

  1. Create a partition on your Mac if you haven't already done so.
  2. Select Continue when the download is finished and ready to install.
  3. Agree to the terms.
  4. Click Agree to confirm that you have read the terms.
  5. Select Show All Disks to switch from your main partition.
  6. Select the partition you wish to install the software on.
  7. Click Install.

The installation helper will allow you to transfer information from your current operating system, or you could choose to do a clean installation to start your Mac from scratch.

How to get started with the macOS Catalina developer beta

Once your Mac reboots, you'll be set up with macOS Catalina. You'll have to follow a couple of steps to get started.

  1. Click on Continue.
  2. Sign in with your Apple ID and password. iCloud will sync your desktop and other files.
  3. Click on Get Started.

You'll be directed to your Home screen where you can start digging around to find all of the fun new features.

Joseph Keller is the former Editor in Chief of iMore. An Apple user for almost 20 years, he spends his time learning the ins and outs of iOS and macOS, always finding ways of getting the most out of his iPhone, iPad, Apple Watch, and Mac.

5 Comments
  • I have an extensive music library culled from all my CDs and AIFF purchased music and all this music after the upgrade exists in iTunes still. The only thing the upgrade did was to create shells in the Music app with the ability to download the must from Apple. There is no facility to import all my music and use it. I'm forced to download all the music from Apple which is not where I bought it nor is it the same format. What the **** happened? They stated we can keep our music, which is true, its still in iTunes but the music is not being used as the Apple Music app points to a new location and uses a different format. I realize its still a beta, but I hope the final product does the same thing. All these years and they still cannot get music management correct. In the past, I've had to refresh my music from the CDs as Apple overwrote the music with its lower quality format and even getting album's songs mislabeled.
  • Another point, since the beta, my books, podcasts, and the like have been separated. So, now if I go into Finder and Location and pick my iPad as an example, if I try to use one of the sync options, it states its going to replace everything on the iPad with what's in the Mac. Well, since the beta all this was separated and my non-Apple books are not included in the new app so what I have on the iPad will be removed... even though these books were on the Mac. So, I cannot successfully sync across devices this way.
  • Not sure if you are complaining, but this is the point of the beta, so that you can test and learn this stuff. There is no documentation about how this stuff works so there is no telling if it is expected behavior or a bug. Report it as it happens using the feedback app appropriately the way you are supposed to when you agree to the beta license and don't complain. It doesn't help. It just turns people off to it thinking that there is a bug when there very well may not be.
  • Wouldn’t a bonafide developer already know this? So whats this article about anyway?
  • New developers might not know, there is always someone who doesn't know