Install Ruby on Mac

Check Current Version of ruby and rails

• Ruby
• Rails

Make sure XCode is installed

$ xcode-select --install

Make sure Homebrew is up to date

• Homebrew

$ ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

You can use Homebrew to install gpg, an encryption program used to check the security of the RVM download. Installing gpg eliminates a warning message which will halt installation of RVM.

$ brew install gpg

After GPG is installed (or if it is already installed), install the security key for RVM:

$ command curl -sSL https://rvm.io/mpapis.asc | gpg --import -

If you skip the gpg steps you may not be able to install RVM.

$ \curl -L https://get.rvm.io | bash -s stable

After installing RVM, you must close and reopen the Terminal window.

Alternatively, you can enter this command to refresh the terminal environment:

$ source ~/.rvm/scripts/rvm

$ rvm install ruby-2.5.0

You may be asked to enter a password. When you enter the password, type carefully. You will not see the characters you enter.

Sometimes a precompiled version of Ruby is available. If not, it takes a long time (about five minutes) to install Ruby because the computer must compile the source code.

Verify that the newest version of Ruby is installed:

$ ruby -v
ruby 2.5.6.

Check what version of Ruby is being used as default

$ rvm list
   ruby-2.5.1 [ x86_64 ]
=* ruby-2.5.6 [ x86_64 ]

# => - current
# =* - current && default
#  * - default

If you need to change from the system or version

either change what is being used

$ rvm use 2.5.6

or change the default

$ rvm --default use 2.5.6

Check and update gem

$ gem -v
2.6.10

Use gem update --system to upgrade the Ruby gem manager:

$ gem update --system

$ rvm 2.5.6
$ rvm gemset create testbay1

or

$ rvm use 2.5.6@testbay1 --create

switch to Testbay1

$ rvm gemset use testbay1

or go back to default

rvm gemset use default

$ gem install bundler

$ gem install nokogiri

$ gem install rails

$ rails -v
Rails 5.2.0

Add to the bottom of your .bash_profile

[[ -r $rvm_path/scripts/completion ]] && . $rvm_path/scripts/completion