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Koji Toyota
Koji Toyota

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The way I installed Ruby on my mac

#ruby #mac #beginners

Prerequisite

Please install Homebrew(official) on your mac.

Install rbenv and ruby-build

At first, I recommend you to install rbenv and ruby-build. They enables you to control Ruby versions flexibly.

brew install rbenv ruby-build
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Although I heard that this way tends to yield(don't catch up with the newest version of ruby), it is simple.

Initialize rbenv

Just execute below

rbenv init
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This command will add eval "$(rbenv init -)" to your ~/.bash_profile.
Please check it like this

less ~/.bash_profile
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If you can't find out the line export PATH="$HOME/.rbenv/bin:$PATH" and eval "$(rbenv init -)", please add it by yourself.

export PATH="$HOME/.rbenv/bin:$PATH"
eval "$(rbenv init -)"
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After that, restart your terminal or reload your .bash_profile with this command.

source ~/.bash_profile
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And you can check you could install rbenv or not by this command

rbenv -v
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This command will return the version of rbenv

Choose the ruby version and install it.

OK, now we can get the list of the versions of Ruby with below.

rbenv install -l
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This time, I assume that we chose 2.5.0 as the target.

rbenv install 2.5.0
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Many commands will be executed.
After they are finished, try this.

rbenv versions
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and you can get like this

* system
  2.5.0
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This indicates you have Ruby 2.5.0 but you are using the pre-installed Ruby.
So, let's change to the target ruby with below

rbenv global 2.5.0
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Check your rbenv

For now, your mac is ready to use the Ruby 2.5.0, but I recommend you to check the status of your rbenv.

curl -fsSL https://github.com/rbenv/rbenv-installer/raw/master/bin/rbenv-doctor | bash
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This will indicate the install status of rbenv.

Top comments (4)

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johand profile image
Johan • • Edited

To prevent installing documentation for gems

touch ~/.gemrc

Inside of this file

install: -N
update: -N

Now your gem install and gem update --system && gem update be more faster avoiding install or updating documentation for the gems

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toyotarone profile image
Koji Toyota • • Edited

Hi Johan!
Thank you for your comment.
Avoiding the installation of documents is a good idea. It takes much time.
I will introduce your suggestion to my environment!

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johand profile image
Johan •

Excellent!

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israelgonzalezb profile image
Israel Gonzalez-Brooks •

You saved me! Your explanation has the additional information that avoids issues with the Mac system ruby version that tripped me up for a little while. Thanks a lot : )

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