# Cold start of Slicer after installing takes long time

**URL:** <https://discourse.slicer.org/t/cold-start-of-slicer-after-installing-takes-long-time/40410>\
**Category:** Support\
**Created:** [November 27, 2024, 4:43pm UTC](https://discourse.slicer.org/t/cold-start-of-slicer-after-installing-takes-long-time/40410 "2024-11-27T16:43:56Z")\
**Posts on this page:** 2\
**Page:** 1

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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:** [November 27, 2024, 4:43pm UTC](https://discourse.slicer.org/t/cold-start-of-slicer-after-installing-takes-long-time/40410/1 "2024-11-27T16:43:56Z")

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I have been testing the preview builds lately on my Mac. After unpacking the slicer DMG file on the desktop, the first time launch of slicer almost take a minute. There are no extension or anything. Is this normal?

There is this message in the log file, which am I not sure what it means:

`2024-11-27 08:42:16.474 Slicer[19293:7600256] WARNING: Secure coding is not enabled for restorable state! Enable secure coding by implementing NSApplicationDelegate.applicationSupportsSecureRestorableState: and returning YES.`

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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:** [November 27, 2024, 4:58pm UTC](https://discourse.slicer.org/t/cold-start-of-slicer-after-installing-takes-long-time/40410/2 "2024-11-27T16:58:00Z")

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I haven’t looked into the details, but yes, when you have a new version or even a new build of a developer version on mac it takes quite a while. I think it’s doing some kind of inspection of each shared library and then caches the result for faster startup the next time.