We’ve temporarily disabled regular Preview and Stable builds of Slicer (and associated extensions) while we prepare the Slicer 5.12 Stable release. The Slicer repository will be tagged, and the release process will start shortly afterward. You can track progress in the pinned release issue: Relea…

Preview builds are now re-enabled. We are continuing to work on the Slicer 5.12 stable release

Slicer 5.12 is now available! In the coming days the community will be putting together a release announcement. [image] Download 3D Slicer 3D Slicer is a free, open source software for visualization, processing, segmentation, registration, and analysis of medical, biomedical, and other…

That should resolve later today or tomorrow. The Preview will be renumbered to 5.13.0. 5.12 will be the last Qt5 based Slicer, and 5.13 will become the active refactoring (expect some breaking changes in the API) for a Slicer 6.0 release based on Qt6.

The Previews are odd-numbered, the stables are even numbered.

There also seems to be an issue with the download site updating to 5.13, working on this

Here are the commits I am planning to include before I tag 5.12.1: COMP: Update DCMTKcs to fix OpenJPEG over-linking on macOS · Slicer/Slicer@8d6575b · GitHub BUG: Disable pip install UI off main thread by ebrahimebrahim · Pull Request #9273 · Slicer/Slicer · GitHub (after it is merged) @lassoan @…

This evening, regular macOS preview and stable builds of Slicer and associated extensions will be disabled in favor of a patch release. Nightly Windows and Linux builds may be unaffected. To track the progress, see Patch Release Slicer v5.12.1 · Issue #9271 · Slicer/Slicer · GitHub

Incremental stable builds seem to be still running now for windows and linux, with the scheduled nightly task is about to start in an hour … so I am are disabling those as well to get the patch release completed. Regular linux and windows preview and stable builds will be disabled for tonight, not j…

The nightly builds have been re-enabled so the dashboards should be back to normal tomorrow

Release of Slicer 5.12 in progress

Development

lukas-folle (Lukas Folle) June 25, 2026, 11:28am 4

So Slicer 5.11 stable release is skipped?
This does look a bit confusing to me:

2026.06.30 Weekly Meeting

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Release of Slicer 5.12 in progress

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