Last day I was upgrade my system to OS X 10.11 and my all projects are not working. my GEM too. my third parts lib too. So I’m trying to reinstall cocoapods via cocoapods, but it shows you 「ERROR: While executing gem … (Errno::EPERM) Operation not permitted - /usr/bin/pod」 here’s a solution may help, source notice that parameter: -n

sudo gem install -n /usr/local/bin cocoapods

And then it works. EOF.