# OpenMC Testing

**URL:** <https://openmc.discourse.group/t/openmc-testing/254>\
**Category:** User Support\
**Created:** [February 24, 2017, 10:44am UTC](https://openmc.discourse.group/t/openmc-testing/254 "2017-02-24T10:44:01Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Blake\_Huff](https://avatars.discourse-cdn.com/v4/letter/b/2acd7d/32.png) [@Blake\_Huff](https://openmc.discourse.group/u/Blake_Huff)\
**Post date:** [February 24, 2017, 10:44am UTC](https://openmc.discourse.group/t/openmc-testing/254/1 "2017-02-24T10:44:01Z")

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Hi all:

I built and installed OpenMC on MacOS 10.12.3. Tests 1, 41, 60 and 72 fail with “Results do not agree.” The dependencies were built using Homebrew, and the cross section set was NNDCs. Are these failures expected? Any thoughts about how to correct them?

Thanks much!

Blake

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**Author:** ![paulromano](https://yyz2.discourse-cdn.com/free1/user_avatar/openmc.discourse.group/paulromano/32/486_2.png) [@paulromano](https://openmc.discourse.group/u/paulromano)\
**Post date:** [February 24, 2017, 9:00pm UTC](https://openmc.discourse.group/t/openmc-testing/254/2 "2017-02-24T21:00:15Z")

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Hi Blake,

I also get a few failures when I run on macOS 10.12.3. Upon looking at the differences in results, they are mostly differences in the seventh/eighth digit so I wouldn’t be too worried about it. I’ll open an issue on our github repo and we will consider how to address it.

Thanks for reporting.

Best regards,  
Paul

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**Author:** ![Blake\_Huff](https://avatars.discourse-cdn.com/v4/letter/b/2acd7d/32.png) [@Blake\_Huff](https://openmc.discourse.group/u/Blake_Huff)\
**Post date:** [February 24, 2017, 9:01pm UTC](https://openmc.discourse.group/t/openmc-testing/254/3 "2017-02-24T21:01:30Z")

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Paul:

Thanks for the speedy response. Let me know if you need help resolving/addressing the issue. Happy to help where I can.

Blake