# installation failure on OS X **URL:** \ **Category:** Mailing List Archive (read-only)\ **Tags:** list-archive\ **Created:** [June 21, 2018, 5:58pm UTC](https://mne.discourse.group/t/installation-failure-on-os-x/1555 "2018-06-21T17:58:10Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [June 21, 2018, 5:58pm UTC](https://mne.discourse.group/t/installation-failure-on-os-x/1555/1 "2018-06-21T17:58:10Z")
External Email - Use Caution Hi,    I could use some help on installing MNE. I have some UNIX experience and am a newcomer to Python. On OS X 10.13.5 I followed the installation instructions at [https://www.martinos.org/mne/stable/install\_mne\_python.html](https://www.martinos.org/mne/stable/install_mne_python.html) The version numbers are: conda 4.5.4 Python 3.6.5 :: Anaconda, Inc. Everything went fine until I got to: conda env create -f environment.yml which resulted in the error: NotWritableError: The current user does not have write permissions to a required path.   path: /Users/jdien/.conda/environments.txt I didn?t notice the error message and went all the way to the end. I got the message that MessagePack wasn?t installed, perhaps because of the error, so I installed it manually. When I wasn?t able to import MNE, I went back and saw the problem. .conda belonged to root rather than me and I didn?t have permission. I fixed the permissions problem and redid the conda env create -f environment.yml step. This time it mostly went fine all the way through. I did get the message that: mkl-random 1.0.1 requires cython, which is not installed. mkl-fft 1.0.0 requires cython, which is not installed. when I tried manually installing cython, I was informed that it was already installed. anyway, when I get to the final step, I get: > > > import mne Traceback (most recent call last):   File "\", line 1, in \ ModuleNotFoundError: No module named 'mne' I?m not sure what to do at this point. Any assistance would be greatly appreciated! Joe ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [June 21, 2018, 7:20pm UTC](https://mne.discourse.group/t/installation-failure-on-os-x/1555/2 "2018-06-21T19:20:26Z")
External Email - Use Caution > When I wasn?t able to import MNE, I went back and saw the problem. .conda > belonged to root rather than me and I didn?t have permission. I fixed the > permissions problem and redid the conda env create -f environment.yml step. That's odd -- perhaps someone did a `sudo` operation at some point. > This time it mostly went fine all the way through. You might need to do `conda env remove -n mne` and then start over. Maybe there was some cruft left in there. > I?m not sure what to do at this point. Any assistance would be greatly > appreciated! You got this error after the `source activate mne` step? If you do `which python` does it tell you `~/anaconda3/envs/mne/bin/python`? Doing `conda list` will list all the packages currently available in the environment. -------------- next part -------------- An HTML attachment was scrubbed... URL: [http://mail.nmr.mgh.harvard.edu/pipermail/mne\_analysis/attachments/20180621/0db127de/attachment.html](http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20180621/0db127de/attachment.html) ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [June 21, 2018, 8:07pm UTC](https://mne.discourse.group/t/installation-failure-on-os-x/1555/3 "2018-06-21T20:07:46Z")
External Email - Use Caution Okay, I did the remove command like you suggested and then redid the curl command (said it was all there), then the conda env create command and it went through everything again. I got the errors about cython again. "which python" does indeed produce the correct result. I did the python command and then ?import mne?. This time no error! conda list does include mne as one of the packages. 🙂 Thanks! Joe