ERROR: While executing gem … (Errno::EPERM) Operation not permitted [duplicate]

Answer 1

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.