Note that this bug only affects OS X 10.7 and 10.8. You can also update OS X to workaround it. Or you can run the following command in Terminal.app to fix calibre 2.15
curl -L https://github.com/kovidgoyal/calibre/raw/master/setup/installer/osx/app/site.py > /Applications/calibre.app/Contents/Resources/Python/lib/python2.7/site.py
Note that this bug only affects OS X 10.7 and 10.8. You can also update OS X to workaround it. Or you can run the following command in Terminal.app to fix calibre 2.15
curl -L https:/ /github. com/kovidgoyal/ calibre/ raw/master/ setup/installer /osx/app/ site.py > /Applications/ calibre. app/Contents/ Resources/ Python/ lib/python2. 7/site. py