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Editorial Team
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Asked: 2026-05-19T22:00:17+00:00

I re-installed Python 2.7 with the official DMG installer from python.org because I needed

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I re-installed Python 2.7 with the official DMG installer from python.org because I needed to use a pre-compiled binary which choked on my 64-bit Python install..
(Recompiling it to run in 64-bit is too difficult for me, not an option)

It worked, the Python mac Installer fixes all the links, so my new python install is 32-bit, but all the virtualenv I had created with the 64-bit Python cannot use Python anymore, here is the output :

dyld: Library not loaded: @executable_path/../.Python
Referenced from: /Users/dom/django/.virtualenvs/lepoc/bin/python
Reason: no suitable image found.  Did find:
/Users/dom/django/.virtualenvs/lepoc/bin/../.Python: no matching architecture in universal wrapper
/Users/dom/django/.virtualenvs/lepoc/bin/../.Python: no matching architecture in universal wrapper
Trace/BPT trap

Is there a possible fix (like re-linking something) or do I have to re-create all my virtualenv ?

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1 Answer

  1. Editorial Team

    I’d go with recreating them. The “python” executable in the bin folder is an executable and is probably specific to your architecture and/or python binary. You can save all installed python packages and reinstall them in the new virtual environment using pip:

    pip freeze -E lepoc > requirements.txt
pip install -E newve -r /path/to/pip-requirements.txt

    See also http://www.saltycrane.com/blog/2009/05/notes-using-pip-and-virtualenv-django/

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