What does it mean and how can I fix it:
pod install /Library/Ruby/Site/2.0.0/rubygems.rb:250:in `find_spec_for_exe': can't find gem cocoapods (>= 0.a) (Gem::GemNotFoundException) from /Library/Ruby/Site/2.0.0/rubygems.rb:278:in `activate_bin_path' from /usr/local/bin/pod:22:in `<main>' Using following commands, it worked for me.
sudo gem uninstall cocoapodssudo gem install -n /usr/local/bin cocoapodscocoapods pod installIf you encounter this error on step 2:
ERROR: While executing gem ... (Gem::CommandLineError) Please specify at least one gem name (e.g. gem build GEMNAME)
Then try this as step 2 instead (step 3 is not needed):
gem install -n /usr/local/bin cocoapods 
sudo gem install -n /usr/local/bin cocoapods worked for me to install cocoapods.
If you install cocoapod using brew like me
Reinstall cocoapods:
brew reinstall cocoapods If you see this error message after you reinstall cocoapods by brew reinstall go to step 2.
> Error: The `brew link` step did not complete successfully The formula built, but is not symlinked into /usr/local Could not symlink bin/pod Target /usr/local/bin/pod already exists. You may want to remove it: rm '/usr/local/bin/pod' To force the link and overwrite all conflicting files: brew link --overwrite cocoapods To list all files that would be deleted: brew link --overwrite --dry-run cocoapods Possible conflicting files are: /usr/local/bin/pod /usr/local/bin/xcodeproj To solve conflicting files:
brew link --overwrite cocoapods Linking /usr/local/Cellar/cocoapods/1.3.1... 2 symlinks created
$(inherited) flag, or - Remove the build settings from the target. Show this error for my all podsUninstall the existing cocoapods, if any, by following command:
gem list --local | grep cocoapods | awk '{print $1}' | xargs sudo gem uninstall Then install it to /usr/local/bin instead of /usr/bin using following command:
sudo gem install -n /usr/local/bin cocoapods For further query, check this link to uninstall and this link to install cocoapods.
In my case nothing helped, then I:
sudo gem uninstall cocoapodscd /Users/nikkov/.rvm/rubies/ruby-2.4.1/lib/ruby; In Finder I searched for cocoapods and removed everything.brew install cocoapodsbrew link --overwrite cocoapods (if needed)
I had upgraded my ruby version 2.5.3 to 2.7.2. Then, I want to update cocoapods from 1.9.3 to 1.10.0 . I got the following error while executing pod install.
can't find gem cocoapods (>= 0.a) with executable pod (Gem::GemNotFoundException)
There are two ways to uninstall cocoapods by using homebrew & gem. If you had install cocoapods using gem run following.
sudo gem uninstall cocoapods sudo gem uninstall -n /usr/local/bin cocoapods If you had used brew please using the following to uninstall
brew uninstall cocoapods If you forgot which one you used earlier, please execute both commands. Please make sure all cocoapods instances are removed to check run pod --version.
If you find -bash: pod: command not found as output, all instances are removed properly. Else, you may need to remove cocoapods related files manually from this directory ~/.rvm/rubies/ruby-2.5.3/lib/ruby.
sudo gem update --system gem install cocoapods CREDIT: https://blog.csdn.net/develop_csdn/article/details/105053383
sudo gem update --system was the key for me. After running this it worked for me. Thanks, Milan.
sudo gem update --system broken all my files permissions. Not able to install any other gem package.Thankfully i found solution after a hour.
As you know, newest Mac Operation System(Big Sur or oldest one) use ruby as a version system. So this ruby is private. You can not write/update some files that belong ruby.
So, we had a change to install rbenv for as a version control.
Firstly you should install rbenv via brew if you don't have
$ brew install rbenv You need to know rbenv version number. You can see with below code snipped
$ rbenv --version Install Xcode's command line tools
xcode-select --install Install rbenv via Homebrew
brew update brew install rbenv ruby-build Configure rbenv
eval "$(rbenv init -)" Install and configure Ruby
rbenv install 3.1.1 rbenv global 3.1.1 rbenv rehash source ~/.bash_profile Install Cocoapods:
gem install cocoapods 
rbenv version I had installed, I had to enter rbenv --versionIn my case the reason of the issue was Gemfile file inside the folder with the project. When I removed this file, cocoapods started functioning as usual.
Try sudo gem update
sudo gem install instead of gem installWhen I tried @Aamir's solution, I ran into the error:
ERROR: Could not find a valid gem 'cocoapods' (>= 0), here is why: Unable to download data from https://rubygems.org/ - no such name (https://api.rubygems.org/specs.4.8.gz)
This worked for my Mac:
sudo gem uninstall cocoapods sudo gem install cocoapods In my opinion if you keep getting these errors for a MacOS in 2023, the best is to try NOT to install the cocoapods using the sudo command "sudo install cocoapods"
rather try installing it from homebrew
if you do not have home-brew on you Mac yet, you can install it using:
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)" then when all the packages are done installing you can now run the brew installation for cocapods:
brew reinstall cocoapods Then when this installation is complete, you can try running the flutter doctor command to check for errors (only if you have flutter installed)
flutter doctor React native has made several changes and this is how you install pods now
In my case I was not able to install pod and cocoapods using gem, after changing command line tools I was able to run the commands
Running these commands worked for me:
brew updatebrew install fastlanefastlane install_pluginsThis helped me after I tried all these ways
xcode-select --install If anyone stumbles upon this as a result of updating to react native 0.67.2+ from an older version (we were on 0.66.0) you have to make sure you re-install cocoapods via gem install cocoapods. Otherwise, your pod install will not work.
To relink, run:
brew unlink cocoapods && brew link cocoapods I'd installed Cocoapods using gem, so I reinstalled it again using gem. nothing happened. so I removed it and install it using brew. it works.
I have also wrote on github, so I will copy it here, maybe it will be helpful for someone.
To be honest none of those solutions worked for me, just typing randomly commands will not help. I don't know why, but my path was misconfigured. So first you should check if the path is good. I have used brew and installed rbenv in order to use safely libraries and after I ran pod install, I saw it was not targeting the right folder and always used the system version.
After I ran command
gem env I saw that some paths are not correct. "INSTALLATION DIRECTORY, RUBY EXECUTABLE, EXECUTABLE DIRECTORY, SYSTEM CONFIGURATION DIRECTORY AND GEM PATH" should start something like this(depends of version) /Users/{username}/.rbenv/versions/3.1.2/lib/ruby/. ... otherwise it uses system version.. In order to fix this you need to set paths in ~/.zshrc and ~/.zprofile
my zshrc looks like this:
export PATH="$HOME/.rbenv/bin:$PATH" eval "$(rbenv init -)" export PATH=/opt/homebrew/bin:$PATH export RBENV_ROOT=$HOME/.rbenv export PATH=$RBENV_ROOT/shims:/versions:$PATH zprofile:
eval $(/opt/homebrew/bin/brew shellenv) in order to change /.zshrc: type nano ~/.zshrc
I got this error when really the problem was that I just needed to re-agree to the Xcode license after updating my os.
I knew this because I ran brew reinstall cocoapods and it told me: Error: You have not agreed to the Xcode license. Please resolve this by running: sudo xcodebuild -license accept
I ran that, and then I didn't get the cocoapods error.
Make sure your xcode version in 16.0 selected.
bundle install