Install RVM in macOS (step by step)

2 min readJun 11, 2020

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Actually, I am waiting for my workmate. He chatted back after I just start a blog. Sorry man, but I can’t stop writing 😛

Prerequisites

1. Install GnuPG

$ brew install gnupg

2. Install GPG keys (pick First way or Second way)

2.1 First way

$ gpg --keyserver hkp://pool.sks-keyservers.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB

2.2 Second way

$ gpg --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB

3. Install RVM

$ \curl -sSL https://get.rvm.io | bash

4. We will receive a thank you 🙏 message in the console.

5. Quit all Terminal

6. Lunch a new Terminal and try this

$ rvm list

7. We will get this message

# No rvm rubies installed yet. Try 'rvm help install'.

8. Install some ruby version such as 2.7.1

$ rvm install 2.7.1

9. After installation, check which ruby version available.

$ rvm listruby-2.7.1 [ x86_64 ]# Default ruby not set. Try 'rvm alias create default <ruby>'.

10. Create default ruby version

$ rvm alias create default 2.7.1

11. That’s it! Enjoys 🎉

For the ruby old version, you may get this below error which relates openssl

/Users/pagorn/.rvm/src/rubygems-3.0.8/lib/rubygems/core_ext/kernel_require.rb:54:in `require': cannot load such file -- openssl (LoadError)

So, we should install openssl from rvm, then install old ruby with this openssl

$ rvm pkg install openssl
$ rvm install 2.3.1 --with-openssl-dir=$HOME/.rvm/usr

When install ruby v3, we may specific openssl location.

Check your openssl location before installation

$ ls /usr/local/opt | grep openssl
openssl
openssl@1.1
openssl@3
openssl@3.1

$ rvm install ruby-3.1.0 --with-openssl-dir=/usr/local/opt/openssl@3.1

$ ls /opt/homebrew/opt | grep openssl
openssl
openssl@1.1
openssl@3
openssl@3.1

$ rvm install ruby-3.1.0 --with-openssl-dir=/opt/homebrew/opt/openssl@3.1