Rails for Mac OS Catalina

Hello,

Super excited to be part of this group as I am in need of help. I have an existing Rails project that I cannot run anymore. I followed the steps here (https://gorails.com/setup/osx/10.15-catalina) and now when checking for ruby version, i still get the old version 2.6.3 while it also shows that I successfully installed 2.7.0.

Also when I run "rails -v" outside the of my rails project and I get a response "Rails 6.0.2.2" but once running rails -v within my project it tells me to run a "bundle install" I get this error:

"An error occurred while installing mysql2 (0.4.10), and Bundler cannot continue.
Make sure that gem install mysql2 -v '0.4.10' --source 'https://rubygems.org/' succeeds before bundling. "

I have been struggling with this for a few days now. I sincerely need and would be genuinely be grateful for any advise.

Thank you,

It probably wouldn't hurt upgrading to the latest version of mysql2: https://rubygems.org/gems/mysql2

If your app has a .ruby-version file, then it will use the Ruby version in that file for the project.

Thank you, Chris for such a speedy reply.

I already did a manual "gem install mysql2" and I get this:
"ERROR: Error installing mysql2:
ERROR: Failed to build gem native extension."
Under my Gemfile I also have "gem 'mysql2', '~> 0.4.10'" before I run the bundle install command.

Aslo the confusing part is it appears that I have two installed ruby versions:
marcguerrero@Marcs-MacBook-Air My_JobList % ruby -v
ruby 2.6.3p62 (2019-04-16 revision 67580) [universal.x86_64-darwin19]
marcguerrero@Marcs-MacBook-Air My_JobList % rvm current
ruby-2.7.0
marcguerrero@Marcs-MacBook-Air My_JobList % rbenv version
2.7.0 (set by /Users/marcguerrero/Rails/proj/.ruby-version)
Not sure where I can check which version my app uses, and if so, how can I switch it to work with the latest ruby version?

Thank you.