OpenIndiana works on most x86 PCs (SPARC has Beta ISO’s, support Welcome).
From 2017.04 onwards running on 32-bit systems is not supported anymore and the userland is being migrated progressively to 64-bit only. As usual 32-bit libraries and core applications are still delivered and maintained for the sake of backward compatibility (but only when running a 64-bit kernel).
For instructions regarding downloading, preparing and installing the images, please refer to the OpenIndiana Handbook.
If want to contribute to the project, find out how you can help.
Download the current Hipster snapshot of OpenIndiana.
These installations can be updated regularly using the Hipster repository, and receive security fixes. Starting with 2017.04 release, every image is signed with OpenIndiana Release Engineering GPG key id DBE31887.