#  running vmtklevelsetsegmentation results in fallback error

**URL:** <https://discourse.slicer.org/t/running-vmtklevelsetsegmentation-results-in-fallback-error/23215>\
**Category:** VMTK\
**Created:** [May 1, 2022, 12:01pm UTC](https://discourse.slicer.org/t/running-vmtklevelsetsegmentation-results-in-fallback-error/23215 "2022-05-01T12:01:58Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![alice-hsu](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/alice-hsu/32/15164_2.png) [@alice-hsu](https://discourse.slicer.org/u/alice-hsu)\
**Post date:** [May 1, 2022, 12:01pm UTC](https://discourse.slicer.org/t/running-vmtklevelsetsegmentation-results-in-fallback-error/23215/1 "2022-05-01T12:01:58Z")

</div>

When I try to run vmtklevelsetsegmentation, I receive a black screen and fallback errors, which I believe is due to depreciation of OpenGL on Mac OS 12. Not sure if this is the right direction, but I would appreciate any advice on how to resolve this issue.

 ![Screen Shot 2022-04-30 at 10.06.29 AM](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/e/1/e14785118008f46904cc0bd089d7062a2111a37b.jpeg)