# Release of Slicer 5.12 in progress

**URL:** <https://discourse.slicer.org/t/release-of-slicer-5-12-in-progress/47440>\
**Category:** Development\
**Created:** [June 23, 2026, 9:40pm UTC](https://discourse.slicer.org/t/release-of-slicer-5-12-in-progress/47440 "2026-06-23T21:40:44Z")\
**Posts on this page:** 15\
**Page:** 1

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**Author:** ![ebrahim](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ebrahim/32/13403_2.png) [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Post date:** [June 23, 2026, 9:40pm UTC](https://discourse.slicer.org/t/release-of-slicer-5-12-in-progress/47440/1 "2026-06-23T21:40:44Z")

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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: [Release Slicer v5.12 · Issue #9180 · Slicer/Slicer · GitHub](https://github.com/Slicer/Slicer/issues/9180)

Thanks for your patience 🙏

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**Author:** ![ebrahim](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ebrahim/32/13403_2.png) [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Post date:** [June 24, 2026, 5:38pm UTC](https://discourse.slicer.org/t/release-of-slicer-5-12-in-progress/47440/2 "2026-06-24T17:38:02Z")

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Preview builds are now re-enabled.

We are continuing to work on the Slicer 5.12 stable release

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**Author:** ![ebrahim](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ebrahim/32/13403_2.png) [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Post date:** [June 24, 2026, 9:03pm UTC](https://discourse.slicer.org/t/release-of-slicer-5-12-in-progress/47440/3 "2026-06-24T21:03:04Z")

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Slicer 5.12 is now available!

In the coming days the community will be putting together a release announcement.

> **[Download 3D Slicer](https://download.slicer.org/)**
>
> 3D Slicer is a free, open source software for visualization, processing, segmentation, registration, and analysis of medical, biomedical, and other 3D images and meshes; and planning and navigating image-guided procedures.

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**Author:** ![lukas-folle](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lukas-folle/32/82530_2.png) [@lukas-folle](https://discourse.slicer.org/u/lukas-folle)\
**Post date:** [June 25, 2026, 11:28am UTC](https://discourse.slicer.org/t/release-of-slicer-5-12-in-progress/47440/4 "2026-06-25T11:28:11Z")

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

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/c/7/c7eb0ef25288a10f91d3a550b6b43ae394121aab.png)

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [June 25, 2026, 11:32am UTC](https://discourse.slicer.org/t/release-of-slicer-5-12-in-progress/47440/5 "2026-06-25T11:32:06Z")

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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.

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**Author:** ![Sam\_Horvath](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/sam_horvath/32/3092_2.png) [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Post date:** [June 25, 2026, 1:59pm UTC](https://discourse.slicer.org/t/release-of-slicer-5-12-in-progress/47440/6 "2026-06-25T13:59:01Z")

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

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**Author:** ![Sam\_Horvath](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/sam_horvath/32/3092_2.png) [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Post date:** [June 25, 2026, 2:03pm UTC](https://discourse.slicer.org/t/release-of-slicer-5-12-in-progress/47440/7 "2026-06-25T14:03:10Z")

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

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**Author:** ![ebrahim](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ebrahim/32/13403_2.png) [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Post date:** [July 8, 2026, 11:19am UTC](https://discourse.slicer.org/t/release-of-slicer-5-12-in-progress/47440/8 "2026-07-08T11:19:18Z")

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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](https://github.com/Slicer/Slicer/commit/8d6575b975adf262a0f226ae906aa25747967203)
- [BUG: Disable pip install UI off main thread by ebrahimebrahim · Pull Request #9273 · Slicer/Slicer · GitHub](https://github.com/Slicer/Slicer/pull/9273/) (after it is merged)

@lassoan @Sam_Horvath @pieper @jamesobutler please let me know if I missed any that you had in mind

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**Author:** ![ebrahim](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ebrahim/32/13403_2.png) [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Post date:** [July 8, 2026, 8:19pm UTC](https://discourse.slicer.org/t/release-of-slicer-5-12-in-progress/47440/9 "2026-07-08T20:19:03Z")

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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](https://github.com/Slicer/Slicer/issues/9271)

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**Author:** ![ebrahim](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ebrahim/32/13403_2.png) [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Post date:** [July 9, 2026, 2:11am UTC](https://discourse.slicer.org/t/release-of-slicer-5-12-in-progress/47440/10 "2026-07-09T02:11:40Z")

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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 just macOS. Sorry for any inconvenience; ty for your patience everyone!

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**Author:** ![ebrahim](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ebrahim/32/13403_2.png) [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Post date:** [July 9, 2026, 1:48pm UTC](https://discourse.slicer.org/t/release-of-slicer-5-12-in-progress/47440/11 "2026-07-09T13:48:56Z")

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The nightly builds have been re-enabled so the [dashboards](https://slicer.cdash.org) should be back to normal tomorrow

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**Author:** ![ebrahim](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ebrahim/32/13403_2.png) [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Post date:** [July 22, 2026, 9:52pm UTC](https://discourse.slicer.org/t/release-of-slicer-5-12-in-progress/47440/12 "2026-07-22T21:52:42Z")

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This evening, regular preview and stable builds of Slicer and associated extensions will be disabled in favor of a **patch** release.

To track the progress, see [Patch Release Slicer v5.12.3 · Issue #9308 · Slicer/Slicer · GitHub](https://github.com/Slicer/Slicer/issues/9308)

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<div class="post-metadata">

**Author:** ![ebrahim](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ebrahim/32/13403_2.png) [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Post date:** [September 9, 2026, 5:37pm UTC](https://discourse.slicer.org/t/release-of-slicer-5-12-in-progress/47440/13 "2026-09-09T17:37:57Z")

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This evening, regular preview and stable builds of Slicer and associated extensions will be disabled so that we can put together **patch release 5.12.4**.

To track the progress and see which fixes are slated for inclusion, see [Patch Release Slicer v5.12.4 · Issue #9387 · Slicer/Slicer · GitHub](https://github.com/Slicer/Slicer/issues/9387)

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**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [September 9, 2026, 5:53pm UTC](https://discourse.slicer.org/t/release-of-slicer-5-12-in-progress/47440/14 "2026-09-09T17:53:00Z")

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Will 5.12.4 support arm64 for macos?

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**Author:** ![ebrahim](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ebrahim/32/13403_2.png) [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Post date:** [September 9, 2026, 6:05pm UTC](https://discourse.slicer.org/t/release-of-slicer-5-12-in-progress/47440/15 "2026-09-09T18:05:34Z")

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No, this is a patch release – bug fixes only

See this comment for the list of bug fixes getting incorporated: [Patch Release Slicer v5.12.4 · Issue #9387 · Slicer/Slicer · GitHub](https://github.com/Slicer/Slicer/issues/9387#issuecomment-5588659601)