Cannot install cocoa pods after uninstalling, results in error

Question

As it has been pointed out below by Ramesh Ramchandaran, this is a cleaner way of doing it, instead of getting around the Security features of OS X.

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

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Original Answer

I'm assuming you're running OS X 10.11.

This is happening because Apple has enabled rootless on the new install.

If you type:

sudo nvram boot-args="rootless=0"; sudo reboot

in terminal.app, your computer will reboot with it disabled.

Once that is done, type:

sudo gem install cocoapods -V

the -V is for verbose and will spit out any errors if they happen.

As rootless does not affect /usr/local/bin, the following succeeds:

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

Any caveats?

Using home-brew or custom $GEM_HOME can help resolving the issue. I did clean installation of ruby with brew: brew install ruby Now the gem stuff seem to happen relative to my /usr/local/bin*, which is exactly what I needed.