I just came across this so I thought I would post it on this board since
I
see cancan come up a lot. It seems that Ryan B. (who is primarily
responsible for cancan) is taking a hiatus and the gem is no longer
being
actively maintained. The collaborators on that gem have formed a new
team
and have released the gem cancancan which is now cancan updated for
Rails
4. You read more about it at the following: