So Rails 2.6 has been released and I just went thru the normal update dance. Here's how I handled upgrading my system. Let's start with the basics:

• OSX Mojave
• Ruby 2.5.1
• MySQL (yeah, yeah I know; not apologizing)

Here is what I did (you should know that I hit issues with older versions of Yarn and Node so I've included updating them as part of this):

1. Started a terminal session.

2. Verified my ruby version:

   ruby –version

3. Verified my rails version:

   rails –version

4. Upgrade Yarn:

   curl -o- -L https://yarnpkg.com/install.sh bash

5. You can either start a new terminal to get your path exports correct (it is set on Terminal start) or simply do this:

   export PATH="$HOME/.yarn/bin:$HOME/.config/yarn/global/node_modules/.bin:$PATH"

6. Upgrade node:

   brew upgrade node

7. Upgrade Ruby to 2.6.2 (not required but I figured why not):

   rvm install 2.6.2

8. Change to the new ruby:

   rvm use ruby-2.6.2

9. Generate a new application:

   rails new lauck –database=mysql

10. If you got anxious and generated a new application prior to installing a new ruby then, you would need to update the Gemfile to reflect the Ruby version and bundle install.

Note: I've named this new test application after one of my favorite librarians.

References: