Dependency issues on OSX 10.10.5

Hi, I installed scrapy using pip and virtualenv.

Everything seems to go fine, but as I try to do anything I get this error:

Traceback (most recent call last):
  File "/Users/seb/stuff/scrapy/scrapy/bin/scrapy", line 7, in <module>
    from scrapy.cmdline import execute
  File "/Users/seb/stuff/scrapy/scrapy/lib/python2.7/site-packages/scrapy/__init__.py", line 48, in <module>
    from scrapy.spiders import Spider
  File "/Users/seb/stuff/scrapy/scrapy/lib/python2.7/site-packages/scrapy/spiders/__init__.py", line 10, in <module>
    from scrapy.http import Request
  File "/Users/seb/stuff/scrapy/scrapy/lib/python2.7/site-packages/scrapy/http/__init__.py", line 11, in <module>
    from scrapy.http.request.form import FormRequest
  File "/Users/seb/stuff/scrapy/scrapy/lib/python2.7/site-packages/scrapy/http/request/form.py", line 9, in <module>
    import lxml.html
  File "/Users/seb/stuff/scrapy/scrapy/lib/python2.7/site-packages/lxml/html/__init__.py", line 42, in <module>
    from lxml import etree
ImportError: dlopen(/Users/seb/stuff/scrapy/scrapy/lib/python2.7/site-packages/lxml/etree.so, 2): Library not loaded: libxml2.2.dylib
  Referenced from: /Users/seb/stuff/scrapy/scrapy/lib/python2.7/site-packages/lxml/etree.so
  Reason: Incompatible library version: etree.so requires version 12.0.0 or later, but libxml2.2.dylib provides version 10.0.0

I tried updating lxml using pip, but I already have the latest version. Why is this happening?

[kmike]

@sebiwi there are also updated install instructions for OS X in Scrapy master: check http://doc.scrapy.org/en/master/intro/install.html#mac-os-x.

[bryan0]

I believe this error occurs when using pyenv or conda with python 2.7. I tried using different minor versions as well and could not get it to work. Just using brew python should work, but if you need more control over your python versions then Scrapy is not compatible for some reason.