Cannot create virtualenv after upgrading OS X 10.6.8 Python to 2.7

[levtatz]

I just updated my system Python like so: http://wolfpaulus.com/jounal/mac/installing_python_osx/

Does anyone have any insight into the following error:

$ mkvirtualenv --no-site-packages example_name
New python executable in example_name/bin/python
ERROR: The executable example_name/bin/python is not functioning
ERROR: It thinks sys.prefix is u'/System/Library/Frameworks/Python.framework/Versions/2.7' (should be u'/Users/lev/.virtualenvs/example_name')
ERROR: virtualenv is not compatible with this system or executable

$ which python
/System/Library/Frameworks/Python.framework/Versions/2.7/bin/python
$ which virtualenv
/System/Library/Frameworks/Python.framework/Versions/2.7/bin/virtualenv
$ which virtualenvwrapper.sh
/System/Library/Frameworks/Python.framework/Versions/2.7/bin/virtualenvwrapper.sh

In my PATH, I have

/System/Library/Frameworks/Python.framework/Versions/2.7/bin

Thank you for your time in advance.

[levtatz]

A possible workaround is described here: http://stackoverflow.com/a/5904670

For me:

/usr/bin/python2.6 /System/Library/Frameworks/Python.framework/Versions/2.7/bin/virtualenv

seems to make it work

[HSDen]

None of the above solutions work. I am also facing the same issue. Tried setting the PYTHONPATH variable as well.

[yan12125]

@Sane-Joker Are you using mkvirtualenv too? mkvirtualenv is part of virtualenvwrapper, and there were reports that virtualenvwrapper is broken on Mac. (#1006) Could you paste your commands and outputs?

[picarus]

I would say that in many cases the issue will be that the user has Anaconda, then the solution is:
https://stackoverflow.com/questions/5904319/problem-with-virtualenv-in-mac-os-x
read answer by wastetime909 (not a waste of time at all!)

You have documented the Anaconda based installation but you don't have an entry in the first section (as you have for other OS). I suggest you add a link from the top so that people don't start a different installation procedure that will end up in trouble.

[everttrollip]

If you are still struggling, and experiencing this issue:

ERROR: virtualenv is not compatible with this system or executable

Have you tried installing virtualenv with conda and trying again?

conda install virtualenv