问题
I removed cocoa pods because it claimed it had installed, but kept saying the command pod wasn\'t found afterward. When trying to reinstall cocoapods (sudo gem install cocoa pods -v) I get this error:
ERROR: While executing gem ... (Errno::EPERM) Operation not permitted - /usr/bin/pod
Any ideas?
回答1:
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
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.
回答2:
As rootless does not affect /usr/local/bin, the following succeeds:
sudo gem install -n /usr/local/bin cocoapods
Any caveats?
回答3:
Using home-brew or custom $GEM_HOME can help resolving the issue.
I did clean installation of ruby with brew:
brew install ruby
Now the gem stuff seem to happen relative to my /usr/local/bin*, which is exactly what I needed.
回答4:
I recommend installing all your gems into your .gem folder in your home folder to avoid using sudo or a ruby version manager as other people suggest.
All you have to do is update your .bash_profile by adding these 2 lines. (Don‘t forget to restart your terminal after applying these changes)
export GEM_HOME=~/.gem
export PATH="$GEM_HOME/bin:$PATH"
回答5:
After updgrading from Yosemite to El Capitan ( 10.11.4), I kept getting the below error message while trying to 'reinstall' Cocoapods ( after trying out pretty much all the solutions under different Stackoverflow threads and the Cocoapods issue-page itself, for the same issue)
"Could not find a valid gem 'cocoapods' (>= 0) in any repository"
However, quit terminal, restarted system, created new Xcode project from the scratch and then when i did 'pod install', it worked.
Note: I was trying to use Alamofire and SwiftyJson cocoapods
来源：https://stackoverflow.com/questions/30812777/cannot-install-cocoa-pods-after-uninstalling-results-in-error