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Operating Systems Lifecycle

Multiple graphic figures working on updating operating systems on various devices


Information Technology (IT) wants our community to learn, teach, and work safely and effectively with technology. We are also charged with the protection of our University data and networks. We cannot meet our goals without your help because cyber security is a shared responsibility.

One of the most effective ways to combat cyber threats is to use a supported operating system (OS) and keep it up-to-date with the latest security patches and updates. Whether you are using a personally-owned computer or a University-provided system, you should regularly check for and apply OS updates. This process not only safeguards your personal information and data, but it also helps to protect our University's data and networks from cyber-criminal malware and network attacks.

To access our University network or use University computing services, applying security updates and running a supported operating system is a requirement of the Pepperdine University Computer and Network Responsible Use Policy.

What You Need to Do

  1. Use a supported operating system
  2. Regularly check for and apply system updates
  3. Practice safe computing practices

Step One: Use a Supported Operating System

Pepperdine University supports Apple macOS and Microsoft Windows operating systems. Once an operating system no longer receives security updates, the OS will no longer be supported and may be blocked from campus networks. While other operating systems (e.g. Linux, ChromeOS, etc.) may work with some University systems, compatibility is not guaranteed, and support is not available for other OS platforms. 

Table of Supported Operating Systems
Status Microsoft Windows Apple macOS
Recommended Windows 10 version 22H2 macOS 14 Sonoma

Windows 11 version 22H2
Windows 11 version 21H2
Windows 10 version 21H2

macOS 13 Ventura, 
macOS 12 Monterey

Before upgrading, always check that your system meets the minimum system requirements for a new operating system (Windows 11 requirements, Windows 10 requirementsApple macOS Sonoma requirements, Apple macOS Ventura requirements, Apple macOS Monterey requirements).

Now Supported!

Testing is complete, and the following operating system(s) can be installed on University-owned computers:

  • Windows 11: Support started September 20, 2023.
  • macOS 14 Sonoma: Support begins January 31, 2024.


Wait! Under Review

New OS versions must be tested to ensure compatibility with core University services. Wait before installing the following:

  • No systems are currently under review.

Going, Going, Gone!

Once vendors stop providing security updates, an OS can no longer be supported.

  • macOS 11 Big Sur: Support ends January 2024.
  • Windows 10 version 21H2: Support ends June 2024.


How to Identify Your OS Version

  Windows: What Version Are You Using?
  MacOS: What Version Are You Using?
  • Select the Apple menu in the top, left corner of your computer screen
  • Choose About This Mac.
  • You should see the macOS name, such as macOS Monterey, followed by the version number.
  • If you need to know the build number as well, click the version number to see it.
  • Need more help? Refer to Apple's instructions, "Find out which macOS your Mac is using."
  Why You Should Wait Before Installing New, Major OS Releases

When Apple or Microsoft release new, major versions of operating systems (e.g. macOS 13 Ventura to macOS 14 Sonoma), please wait for University guidance before applying these brand new OS versions. Instead, keep your current OS version up-to-date with security patches until the University confirms that the new OS is compatible with University software and services.

The latest and greatest versions of operating systems will sometimes experience problems shortly after the release with popular software, such as Adobe Creative Cloud, antivirus, encryption, or specialty school software. Be patient as University and school staff evaluate potential impacts so that you can keep learning, teaching, and working effectively.

Need Guidance?
  • Contact your local school technical support team for advice
  • Contact Tech Central at 310.506.4357 for guidance


  OS Versions No Longer Supported

Once an operating system is no longer receiving regular security updates, it is deemed insecure and no longer supported. If you are using an unsupported OS, you are placing your personal data and the data and systems of the University at risk. Unsupported operating systems are also routinely blocked from University campus networks.

Table of Windows 10 Education and MacOS Versions that are No Longer Receiving Security Patches
OS Version End of Security Patches
Windows 10, version 20H2 2023-05-09
Windows 10, version 21H1 2022-12-13
MacOS 10.15 (Catalina) 2022-11-30
Windows 10, version 1909 2022-05-10
MacOS 10.14 (Mojave) 2022-01-01
Windows 10, version 2004 2021-12-14
Windows 10, version 1809 2021-05-11
MacOS 10.13 (High Sierra)
Windows 10, version 1903 2020-12-08
 Windows 10, version 1803 2020-10-11
 Windows 10, version 1709 2020-10-11
 Windows 7 Enterprise 2020-01-14
 MacOS 10.12 (Sierra) 2020-01-01
Any older macOS or Windows systems

To learn more about Microsoft's OS lifecycle, please review the Windows 10 Enterprise and Education Lifecycle. To learn about the latest Apple MacOS versions, please review the Apple Security Releases. A rule of thumb for Apple MacOS security updates is that the company will support the most recent two versions of the software and stop supporting the previous version roughly November of the year after the latest MacOS release.



Step Two: Regularly Check for and Apply Updates

Pepperdine University relies on its community members to maintain their computer operating systems (OS) with the appropriate updates and security patches. Whether it is a personally-owned or University-provided computer or mobile device, it's critical that you apply the appropriate updates. This process not only safeguards your personal information and data, but it also helps to protect our University's data and networks from cyber-criminal malware and network attacks.

Applying the appropriate security updates and OS patches is a requirement of our University's Computer and Network Responsible Use Policy.


Step Three: Practice Safe Computing Practices

Cybersecurity is a shared responsibility. In addition to keeping your OS up-to-date, learn more about safe computing practices

This is just the tip of the iceberg. Please review the Information Security Office's Security Tips to learn more.

Thank you for helping to protect your personal data and our Pepperdine University data and resources.


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