Updates to Supported Operating Systems and Secure Browsers for 2025–26

Email Update, August 20, 2025

Dear LEA CAASPP Coordinator, LEA ELPAC Coordinator, or Technology Coordinator:

Operating systems and secure browsers supported for 2025–26 CAASPP and ELPAC testing were updated as of July 7, 2025. Most expiring desktop and mobile secure browser versions will continue to receive formal support through October 31, 2025.

LEAs using devices with Google ChromeOS will require a new secure browser application, beginning with the release of ChromeOS version 139. Devices that remain on ChromeOS version 138 can continue to use the previously available version of the secure browser. Please refer to the ChromeOS Secure Browser Update email sent on July 21, 2025, for additional information.

Windows, macOS, and Linux operating systems will require the desktop secure browser version 18 for all CAASPP and ELPAC computer-based test administrations. iPadOS will continue to use secure browser version 8.

The tables that follow list the changes in operating systems, secure browsers, and associated software that are supported for 2025–26 testing.

Google ChromeOS
Newly Supported for 2025–26	Support Will Expire on Release of New Secure Browser Version
ChromeOS 138 long-term support candidate (LTC) and above ChromeOS 138 long-term support (LTS) and above ChromeOS 138 (stable) and above ChromeOS version 139 Legacy secure browser (for use with ChromeOS version 138 and below) Secure browser progressive web application (must be used with Chrome OS version 139 and above)	LTC ChromeOS version 137 or below LTS ChromeOS version 137 or below ChromeOS version 137 (stable) or below

Microsoft Windows
Newly Supported for 2025–26	Support Will Expire October 31, 2025
Windows 10 builds and sub-versions released in May 2025 and later Windows 11 builds and sub-versions released in May 2025 and later Presumed new Windows version to be released in September 2025 Job Access With Speech (JAWS®) versions 2023, 2024, and 2025 (upon release) Desktop secure browser v18	All Windows 10 and 11 builds and sub-versions prior to May 2025 Note: Microsoft’s end of life for Windows 10 is October 14, 2025. Windows 10 will no longer be supported after the 2025–26 school year is completed. Desktop secure browser v17

Apple macOS
Newly Supported for 2025–26	Support Will Expire October 31, 2025
macOS 16+ (upon release and acceptance) macOS 15+ “Sequoia” builds and sub-versions released in May 2025 and later macOS 14.6+ “Sonoma” builds and sub-versions released in May 2025 and later macOS 13.6+ “Ventura” builds and sub-versions released in May 2025 and later Desktop secure browser v18	All macOS 12 “Monterey” builds and sub-versions Desktop secure browser v17 or lower

Apple iPadOS
Newly Supported for 2025–26	Support Will Expire October 31, 2025
iPadOS 19 (upon release and acceptance) iPadOS 18.3 builds and sub-versions released in May 2025 and later iPadOS 17.7 builds and sub-versions released in May 2025 and later	iPadOS 16

Linux
Newly Supported for 2025–26	Support Will Expire October 31, 2025
Fedora 40 Fedora 41 Ubuntu 22 LTS Ubuntu 24 LTS Desktop secure browser v18	Fedora 39 and below Ubuntu 20 and below Desktop secure browser v17

For further support, visit the Contact Us web page.

Sincerely,

California Outreach Team
CAASPP & ELPAC Website

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Updates to Supported Operating Systems and Secure Browsers for 2025–26

Google ChromeOS

Microsoft Windows

Apple macOS

Apple iPadOS

Linux