# Cannot launch QT Creator on MacOS

**URL:** <https://discourse.slicer.org/t/cannot-launch-qt-creator-on-macos/11620>\
**Category:** Development\
**Created:** [May 19, 2020, 1:45pm UTC](https://discourse.slicer.org/t/cannot-launch-qt-creator-on-macos/11620 "2020-05-19T13:45:18Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![che85](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/che85/32/636_2.png) [@che85](https://discourse.slicer.org/u/che85)\
**Post date:** [May 19, 2020, 1:45pm UTC](https://discourse.slicer.org/t/cannot-launch-qt-creator-on-macos/11620/1 "2020-05-19T13:45:18Z")

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Hi all,

I am trying to launch QT Creator for debugging the nightly build, but it’s not launching.

Platform: macOS Mojave  
SlicerBuild: succeeded  
QT version: 5.14.2  
QT creator: 4.12

I created a gist here (using `export DYLD_PRINT_LIBRARIES=1`):

> <https://gist.github.com/che85/e20e761a3a42b672c02e0e17df87daa1>

Does anyone know what could be causing this?

Thank you,  
Christian

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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:** [May 19, 2020, 3:29pm UTC](https://discourse.slicer.org/t/cannot-launch-qt-creator-on-macos/11620/2 "2020-05-19T15:29:24Z")

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It seems like that should work as long as creator comes from the same Qt you used to build Slicer.

FWIW, I typically use Xcode for debugging on mac by manually copying the launcher environment into the project settings. The homebrew Qt comes with creator, and that works for me if I attach to a running instance, but not when I start it with the Slicer launcher.

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<div class="post-metadata">

**Author:** ![che85](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/che85/32/636_2.png) [@che85](https://discourse.slicer.org/u/che85)\
**Post date:** [May 19, 2020, 5:25pm UTC](https://discourse.slicer.org/t/cannot-launch-qt-creator-on-macos/11620/3 "2020-05-19T17:25:25Z")

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FYI,

I built Qt Creator from source with my local qt version and now it’s working to launch it.

I followed the instructions given here: [https://wiki.qt.io/Building\_Qt\_Creator\_from\_Git](https://wiki.qt.io/Building_Qt_Creator_from_Git)