# Dowload Extension

**URL:** <https://discourse.slicer.org/t/dowload-extension/8645>\
**Category:** Support\
**Created:** [October 1, 2019, 9:11pm UTC](https://discourse.slicer.org/t/dowload-extension/8645 "2019-10-01T21:11:20Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![LucasMD](https://avatars.discourse-cdn.com/v4/letter/l/e9a140/32.png) [@LucasMD](https://discourse.slicer.org/u/LucasMD)\
**Post date:** [October 1, 2019, 9:11pm UTC](https://discourse.slicer.org/t/dowload-extension/8645/1 "2019-10-01T21:11:20Z")

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Operating system: Mac Mojave 10.14.5  
Slicer version:4.10.2  
Expected behavior:  
Actual behavior:

Hello. I have a problem when I try to download an extension. I join in extension manager and appear the following error:

extensions install directory is expected to be readable/writable/executable: /Volumes/Slicer-4.10.2-macosx-amd64/Slicer.app/Contents/Extensions-2825

can someone help me? thank you

Lucas

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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:** [October 1, 2019, 9:29pm UTC](https://discourse.slicer.org/t/dowload-extension/8645/2 "2019-10-01T21:29:44Z")

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It seems that you haven’t installed the application. These instructions should help: [https://www.slicer.org/wiki/Documentation/Nightly/SlicerApplication/Installation](https://www.slicer.org/wiki/Documentation/Nightly/SlicerApplication/Installation)