# App crashes with collisionobject (Mac)

**URL:** <https://forum.defold.com/t/app-crashes-with-collisionobject-mac/426>\
**Category:** Bugs\
**Created:** [November 4, 2015, 10:32pm UTC](https://forum.defold.com/t/app-crashes-with-collisionobject-mac/426 "2015-11-04T22:32:23Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![iCastanera](https://forum-defold.b-cdn.net/user_avatar/forum.defold.com/icastanera/32/174_2.png) [@iCastanera](https://forum.defold.com/u/iCastanera)\
**Post date:** [November 4, 2015, 10:32pm UTC](https://forum.defold.com/t/app-crashes-with-collisionobject-mac/426/1 "2015-11-04T22:32:23Z")

</div>

Hi, I’m doing the first tutorial (side-scrolling) and every time that I add a shape to a collisionobject the engine has crashed. Not really sure If It’s because of the collisionobject or the shape.  
If It’s useful I can upload the Error report generated after forcing the closure of the app.

I would like to take this opportunity to thank you for inviting me to beta, the engine transmits very good feelings so… Congrats and best wishes polishing and improving it!

---

<div class="post-metadata">

**Author:** ![britzl](https://forum-defold.b-cdn.net/user_avatar/forum.defold.com/britzl/32/23_2.png) [@britzl](https://forum.defold.com/u/britzl)\
**Post date:** [November 5, 2015, 5:31am UTC](https://forum.defold.com/t/app-crashes-with-collisionobject-mac/426/2 "2015-11-05T05:31:13Z")

</div>

Could you please describe exactly the steps you go through, from opening the project until the crash (or record a video).