A knowledge base article about How do I know if my operating system is supported? provided by the UC Berkeley IT Service Hub - Knowledge Portal
Devices connected to a UC Berkeley network, including personal devices, must run only supported software and operating systems for which security patches are made available in a timely manner. All currently available security patches must be applied on a schedule appropriate to the severity of the risk they mitigate.
See our campus Minimum Security Standards for Network Devices (MSSND).
Microsoft publishes current lifecycle information for Windows operating systems. If your version of Windows is past the extended support date or not listed, your operating system is not supported, and you must retire the system or upgrade to a supported version of Windows. When planning for department equipment purchases and upgrades, be aware of any upcoming “end of life” dates for your version of Windows.
While Apple does not officially acknowledge the end of support for Mac OS X, past experience shows that security updates addressing critical vulnerabilities are released only for the current and two previous versions of macOS. When Apple releases security updates for Mac OS X, operating systems with vulnerabilities that Apple has not patched will be considered unsupported.
MacOS users should plan on upgrading their operating systems regularly as Apple releases new versions. We recommend updating to either the latest or the previous version within 90 days of a new version's release.
A list of current security updates can be found on the Apple Support site: https://support.apple.com/en-us/HT20122
Check with your vendor to confirm whether your version is still supported and receiving security updates for known vulnerabilities. Operating system vendors often publish lifecycle information to assist customers with upgrade planning:
If your operating system is not currently supported, and you cannot immediately upgrade to a supported release, you must request a policy exception to keep the machine connected to the campus network. Your request should include details such as: