I’ve just fixed this issue on my OS X.
Please backup your files first.
sudo rm -rf /Library/Python/2.7/site-packages/six*
sudo rm -rf /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/six*
sudo pip install six
Scrapy 1.0.0 is ready to go.
If you encounter an error rm: /System/Library/... Operation not permitted
Please try to disable System Integrity Protection
See Operation Not Permitted when on root El capitan (rootless disabled)