问题
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.
回答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
回答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:
- Reboot your Mac into Recovery Mode by restarting your computer and holding down Command+R until the Apple logo appears on your screen.
- Click Utilities > Terminal.
- In the Terminal window, type in csrutil disable and press Enter.
- Restart your Mac.
来源：https://stackoverflow.com/questions/32891965/error-while-executing-gem-errnoeperm-operation-not-permitted