Does Mage-OS 1.x run on PHP 8.5?
NoNone of the 12 Mage-OS 1.x releases we tested install on PHP 8.5. The product's Composer constraints do not allow this PHP version. The newest Mage-OS release that installs on PHP 8.5 is 3.5.0. Mage-OS lists PHP 8.3 for 1.3.1.
Last run 5 October 2026. Each run is the stack Mage-OS recommends for the release with only the php swapped for PHP 8.5, installed in Docker, compiled and put through storefront, checkout and admin browser tests.
Every Mage-OS 1.x release on PHP 8.5
Each cell links to the release page with every setup and run log.
Why it failed
The product's Composer constraints do not allow this PHP version.
Stopped at install on 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.1.0, 1.1.1, 1.2.0, 1.3.0, 1.3.1.
Other php versions for Mage-OS 1.x
PHP 8.5 on other Mage-OS lines
See every Magento and Mage-OS release on PHP 8.5, orevery setup for Mage-OS 1.3.1.