# Application start of time taking 30+ minutes.

**URL:** <https://discourse.slicer.org/t/application-start-of-time-taking-30-minutes/44908>\
**Category:** Support\
**Created:** [October 29, 2025, 2:29am UTC](https://discourse.slicer.org/t/application-start-of-time-taking-30-minutes/44908 "2025-10-29T02:29:12Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![marto045](https://avatars.discourse-cdn.com/v4/letter/m/c37758/32.png) [@marto045](https://discourse.slicer.org/u/marto045)\
**Post date:** [October 29, 2025, 2:29am UTC](https://discourse.slicer.org/t/application-start-of-time-taking-30-minutes/44908/1 "2025-10-29T02:29:12Z")

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My application takes about 20-30 minutes to s It works fine when it finally opens. I have tried to uninstall the application and reinstall with no luck. It gets on this attached picture. Wondering if anyone had recs to help resolve the prolonged start up time?

 ![Screenshot 2025-10-28 at 6.12.35 PM](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/1/4/14e999abdbfd38331b3479a094ed0415daf1e691.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:** [October 29, 2025, 2:33am UTC](https://discourse.slicer.org/t/application-start-of-time-taking-30-minutes/44908/2 "2025-10-29T02:33:39Z")

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The startup time should be 20-30 seconds and not 20-30 minutes. That said, the binaries in the Slicer Preview Releases are not signed or notarized, so macOS may perform lengthy extra checks. Startup time of a Slicer Stable Release should be much faster. A slow disk and certain extensions may also delay the startup.