# Slicer quits unexpectedly

**URL:** <https://discourse.slicer.org/t/slicer-quits-unexpectedly/11333>\
**Category:** Support\
**Created:** [April 28, 2020, 9:09pm UTC](https://discourse.slicer.org/t/slicer-quits-unexpectedly/11333 "2020-04-28T21:09:56Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Allison\_Brea](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/allison_brea/32/6580_2.png) [@Allison\_Brea](https://discourse.slicer.org/u/Allison_Brea)\
**Post date:** [April 28, 2020, 9:09pm UTC](https://discourse.slicer.org/t/slicer-quits-unexpectedly/11333/1 "2020-04-28T21:09:56Z")

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Hello,  
I am working on a research with CT scans. I have a brand new Mac book pro with a lot of empty space and fully updated software. Every time I click segment editor the app unexpectedly crashes. After talking to Apple Care, they confirmed that the problem was within the app and not with the computer. Here is the error message I have been receiving. Anyone have any suggestions?

 ![Screen Shot 2020-04-28 at 5.04.27 PM](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/5/1/51aee5a515659b1b70453563c13d7c5919d9faca.jpeg)

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [April 28, 2020, 9:21pm UTC](https://discourse.slicer.org/t/slicer-quits-unexpectedly/11333/2 "2020-04-28T21:21:02Z")

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Please try if you can reproduce the error with the latest Slicer Preview Release.

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**Author:** ![Allison\_Brea](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/allison_brea/32/6580_2.png) [@Allison\_Brea](https://discourse.slicer.org/u/Allison_Brea)\
**Post date:** [April 28, 2020, 11:34pm UTC](https://discourse.slicer.org/t/slicer-quits-unexpectedly/11333/3 "2020-04-28T23:34:51Z")

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Is there any way to recover the data lost when it quit unexpectedly? I’ve lost hours of work when it deleted.

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**Author:** ![Allison\_Brea](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/allison_brea/32/6580_2.png) [@Allison\_Brea](https://discourse.slicer.org/u/Allison_Brea)\
**Post date:** [April 28, 2020, 11:42pm UTC](https://discourse.slicer.org/t/slicer-quits-unexpectedly/11333/4 "2020-04-28T23:42:48Z")

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The computer will not allow me to download the new version.

 ![Screen Shot 2020-04-28 at 7.42.12 PM](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/e/0/e022d001591093fe31c191c7d781e6edff05b93a.png)

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<div class="post-metadata">

**Author:** ![Allison\_Brea](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/allison_brea/32/6580_2.png) [@Allison\_Brea](https://discourse.slicer.org/u/Allison_Brea)\
**Post date:** [April 29, 2020, 12:42am UTC](https://discourse.slicer.org/t/slicer-quits-unexpectedly/11333/5 "2020-04-29T00:42:40Z")

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I’ve tested the application on a separate apple computer and it produced the same error notification quitting unexpectedly.

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [April 30, 2020, 4:08am UTC](https://discourse.slicer.org/t/slicer-quits-unexpectedly/11333/6 "2020-04-30T04:08:34Z")

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> [@Allison\_Brea](#):
>
> Is there any way to recover the data lost when it quit unexpectedly? I’ve lost hours of work when it deleted.

Unfortunately, you can only load the data that you have saved.

> [@Allison\_Brea](#):
>
> The computer will not allow me to download the new version.

This popup is just a standard warning message for applications that are not digitally signed with a certificate. You see this because Slicer Preview Releases are not signed (this may change soon, see details [here](https://github.com/Slicer/Slicer/issues/4724)).

You can search on the web for instructions how to install unsigned applications or you can follow [these steps](https://stackoverflow.com/questions/59890359/developer-cannot-be-verified-macos-error-exception-a-move-to-trash-b-cancel).