Just updated my Mac to El Capitan 10.11. I am trying to run Django 1.6 with Celery 3.1 and I\'m getting this error now:
Unhandled exception in thread starte
I suspect (but can't confirm) the System Integrity Protection (SIP) of OSX El Capitan is preventing access to your /usr/lib folder.
It would be extreme and defeating the purpose of the security feature, but you could try disabling SIP by booting into the OS X Recovery partition, executing csrutil disable and rebooting...atleast until another option / work-around can be found.
ArsTechnica has a write-up here: http://arstechnica.com/apple/2015/09/os-x-10-11-el-capitan-the-ars-technica-review/9/
And a similar issue is described here: http://blog.honekamp.net/blog/2015/09/07/el-cap-and-my-printer/
More discussion on Hacker News here: https://news.ycombinator.com/item?id=10309576