ERROR: While executing gem … (Errno::EPERM) Operat

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• Can't install gems on OS X “El Capitan” 14 answers

I just updated my Mac to OSX 10.11 El Capitan and some gems didn't remain.

The problem arose when I tried to run installations of different gems... e.g.:

> sudo gem install compass

Once I execute, I get the error:

> ERROR:  While executing gem ... (Errno::EPERM) Operation not permitted

This happens with other gems, as well...

I've run Homebrew and tried to install Ruby again, but nothing is working.

Answer 1

I found the answer on SASS issues.. https://github.com/sass/sass/issues/1768

Apparently with OSX el Capitan, there is a new security function that prevents you from modifying system files called Rootless. So you'll have 2 options:

If you install gems on /usr/local/bin there will be no problem because rootless doesn't affect this path.

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

Answer 2

You are experiencing this issue because of a new security feature called System Integrity Protection

You can disable SIP by following the process mentioned below:

1. Reboot your Mac into Recovery Mode by restarting your computer and holding down Command+R until the Apple logo appears on your screen.
2. Click Utilities > Terminal.
3. In the Terminal window, type in csrutil disable and press Enter.
4. Restart your Mac.