# Mac El Capitan: problem with configure the MRtrix install

**URL:** https://community.mrtrix.org/t/mac-el-capitan-problem-with-configure-the-mrtrix-install/274
**Category:** Uncategorized
**Tags:** installation, macos
**Created:** [June 3, 2016, 1:32pm UTC](https://community.mrtrix.org/t/mac-el-capitan-problem-with-configure-the-mrtrix-install/274 "2016-06-03T13:32:45Z")
**Posts on this page:** 1
**Showing post:** 11

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### Author: ![jdtournier](https://community.mrtrix.org/user_avatar/community.mrtrix.org/jdtournier/32/2594_2.png) [@jdtournier](https://community.mrtrix.org/u/jdtournier)
#### Post date: [June 3, 2016, 7:38pm UTC](https://community.mrtrix.org/t/mac-el-capitan-problem-with-configure-the-mrtrix-install/274/11 "2016-06-03T19:38:24Z")

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Glad to hear updating XCode was all it took.

As to the Eigen3 issue, can you try installing the `pkg-config` package via macports/homebrew (along with the `Eigen3` one), and trying again? I’m not sure that’s what the problem is (see [this post](https://community.mrtrix.org/t/mac-i-came-across-this-problem-in-the-process-of-install/240/10?u=jdtournier), where the same issue is cropping up), but I have a feeling that might fix it. If it does, you won’t need the standalone download or setting the `EIGEN_CFLAGS`, it should just work.

Clearly, it none of that works, we’ll need to reassess. In that case, I’ll ask you to post your `configure.log` output again - that’s the only way we’re going to have any hints as to what the issue might be.

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