How do I install RubyGems on my Mac?
I tried to run $ gem install rubygems-update with no luck . It returns
ERROR: While executing gem ... (Gem::FilePermissionError) You don't have write permissions for the /Library/Ruby/Gems/2.0.0 directory.Any help would be great. Thanks
35 Answers
I would highly suggest using a package manager and a Ruby Environment Manager.
On Mac:
brew update
brew install ruby
# If you use bash
echo 'export PATH=/usr/local/Cellar/ruby/2.4.1_1/bin:$PATH' >> ~/.bash_profile
# If you use ZSH:
echo 'export PATH=/usr/local/Cellar/ruby/2.4.1_1/bin:$PATH' >> ~/.zprofileYou can do that but I suggest using an Environment Manager for Ruby.
You have rbenv and RVM.
IMO go for rbenv:
brew install rbenv ruby-build
# bash
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile
echo 'eval "$(rbenv init -)"' >> ~/.bash_profile
# zsh
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.zprofile
echo 'eval "$(rbenv init -)"' >> ~/.zprofile
# list all available versions:
rbenv install -l
# install a Ruby version:
rbenv install 2.4.1
# set ruby version for a specific dir
rbenv local 2.4.1
# set ruby version globally
rbenv global 2.4.1
rbenv rehash
gem update --systemOne more variant is to use brew-gem.
Just copy/paste from the documentation:
brew install brew-gem
Usage
brew gem install herokuTo install a specific version:
brew gem install heroku 3.8.3To install using a brew installed ruby(/usr/local/bin/ruby):
brew gem install heroku --homebrew-rubyAnd with a specific version:
brew gem install heroku 3.8.3 --homebrew-rubyTo upgrade:
brew gem upgrade herokuTo uninstall:
brew gem uninstall herokuTo check information:
brew gem info herokuNote: Installed gems are listed in brew list with prefix of gem-, like gem-heroku.
After installing cocoapods as Tulon suggested the thing which worked for me was passing the --user-install flag to the gem install command e.g
gem install rubygems-update --user-install
from
You may have to install manually in which case (as per the official website):
- Go to the official website and download the zip file
- Unzip the file in a directory.
- Then go to the directory in your terminal and run:
ruby setup.rb
It is showing that you don't have the permission to write something in that directory. Instead use this directory :
sudo gem install -n /usr/local/bin cocoapods
It perfectly work for me.
(I am using macOS Sierra, version 10.12.6)
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