Xcode is using ruby 2.7 but terminal version shows 2.6

Question

I want to apologise in advance if I write somethings that are not accurate enough as I may lack of knowledge.

I am working on a new Mac Mini M1 machine and I am using Xcode 12.2.1 on Monterrey. During the environment setup, I installed homebrew and I may (not sure) also installed ruby.

The Xcode project that I am trying to build has a build phase executing a ruby file and I see the following error:

When using my terminal, if I run which ruby and which -a ruby I see the following output.

But when I run ruby -v I see:

and when I run gem env

At this point I am confused

• Which version is the system version and which one is the homebrew (If any)
• Do I have 2 versions of ruby installed?
• Why Xcode and which returns 2.7 but ruby --version returns 2.6

Answer 1

Thanks to Matt's article, I was able to figure out that:

• /System/Library/Frameworks/Ruby.framework is the folder where the one provided by apple is located.
• Homebrew installs rbenv which is used to manage ruby versions
• If I run rbenv versions then I get which versions of ruby are installed.

Then from here I follow the steps to select a new ruby version:

% rbenv global 2.7.3
% rbenv rehash
% rbenv init
% cd
% echo 'eval "$(rbenv init -)"' >> .zshrc