Operation not permitted - /usr/bin/update_rubygems

Question

When I execute on osx El Capitan:

sudo gem update --system  

I got the error:

Updating rubygems-update
ERROR:  While execut         


        

Answer 1

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For those that are still having this issue, basically it was a security upgrade that Apple release in the new OSx. It's a System Integrity Protection which is basically a "rootless" security system. Follow these steps to disable:

http://osxdaily.com/2015/10/05/disable-rootless-system-integrity-protection-mac-os-x/

Take Note This should only be done if you understand what you are doing and why!