# Extensions can not be installed

**URL:** <https://discourse.slicer.org/t/extensions-can-not-be-installed/6810>\
**Category:** Support\
**Created:** [May 15, 2019, 10:01pm UTC](https://discourse.slicer.org/t/extensions-can-not-be-installed/6810 "2019-05-15T22:01:02Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Nick1998](https://avatars.discourse-cdn.com/v4/letter/n/898d66/32.png) [@Nick1998](https://discourse.slicer.org/u/Nick1998)\
**Post date:** [May 15, 2019, 10:01pm UTC](https://discourse.slicer.org/t/extensions-can-not-be-installed/6810/1 "2019-05-15T22:01:02Z")

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Operating system: MacOS Mojave 10.14.2  
Slicer version: 4.10.1  
Expected behavior:  
Actual behavior:

Hi Everyone,  
I am having a lot of trouble trying to figure out the extensions manager on my laptop. I have been trying to download a few segmentation extensions but for some reason, I am unable to open the extensions manager through the application. Do I have to download the extension manager through a different source and if so, how? Any help would be greatly appreciated.

Thanks

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**Author:** ![Nick1998](https://avatars.discourse-cdn.com/v4/letter/n/898d66/32.png) [@Nick1998](https://discourse.slicer.org/u/Nick1998)\
**Post date:** [May 15, 2019, 10:08pm UTC](https://discourse.slicer.org/t/extensions-can-not-be-installed/6810/2 "2019-05-15T22:08:18Z")

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This is the image that keeps popping up on my screen.

 ![41%20PM](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/9/1/9165e83b2f24ecbb5be5f02694ec44192aff9c33.png)

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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:** [May 15, 2019, 10:11pm UTC](https://discourse.slicer.org/t/extensions-can-not-be-installed/6810/3 "2019-05-15T22:11:20Z")

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Have you dragged the Slicer application icon to the Applications folder?

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**Author:** ![Nick1998](https://avatars.discourse-cdn.com/v4/letter/n/898d66/32.png) [@Nick1998](https://discourse.slicer.org/u/Nick1998)\
**Post date:** [May 15, 2019, 10:13pm UTC](https://discourse.slicer.org/t/extensions-can-not-be-installed/6810/4 "2019-05-15T22:13:59Z")

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I thought I did but turns out I did not. Thank you very much

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**Author:** ![cyufu](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/cyufu/32/1779_2.png) [@cyufu](https://discourse.slicer.org/u/cyufu)\
**Post date:** [May 16, 2019, 8:29am UTC](https://discourse.slicer.org/t/extensions-can-not-be-installed/6810/5 "2019-05-16T08:29:59Z")

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[download the extension manager through a different source](http://slicer.kitware.com/midas3/slicerappstore?layout=empty&os=win&arch=amd64&revision=27931)