Now from that directory, if I type ls, space, dash la, we'll get a list of the files and you'll see that I have a file here called bash profile. First, let's make sure that we're in our user directory using cd, space, and the tilde symbol. So, in order to do that, I'm going to go in and edit a configuration file. At this time, we want to initialize it, but we don't want to just initialize it this one time, we want the initialization to happen every time we launch a new window.
#RUBY DOWNLOAD FOR MAC INSTALL#
Now at the same time, it's also going to download something else called Ruby Build, and Ruby Build is going to allow us to install new versions of Ruby. Now if I type that, it's going to go back out and get the package for rbenv and download it. So, now I'll say brew install and then rbenv, with E-N-V. It did find something new and it downloaded that, but no other changes were needed. It's going to go out and check and see if there's anything new that it needs to download. I'm going to type brew update, 'cause I'm going to use Homebrew in order to do the installation. To do that, I'm going to go to the command line, you can see I've already checked to see what version of Ruby that I have.
#RUBY DOWNLOAD FOR MAC HOW TO#
Let me show you how to install rbenv, that's the one I prefer. But you can still then have newer projects that use newer versions of Ruby on Rails and newer versions of Ruby. What's great about both of those is it allows us to control the Ruby version that we're using, to have multiple versions installed, to switch between them, and even to have some projects use one version, while another project uses a different version of Ruby, and that's very useful when you have some older Legacy projects that are still using older versions of Ruby on Rails that need an older version of Ruby. Both are small package managers that specialize in just managing the version of Ruby that we're using. You can go to the Ruby language website and download installers from there, you can use Homebrew to actually install a version of Ruby, or what most Ruby developers do is they use either RVM, short for Ruby Version Manager, or rbenv. There are a few different ways that you can do that. Your project may depend upon having certain versions of Ruby, so it's better if we can control and manage our own version of Ruby, and that's what we're going to see how to do. It's great to have that version of System Ruby there to get us started, but it's also not a great idea to rely on it, after all, if Apple updates the operating system, the version of Ruby that's included would be upgraded as well, and that may not be something that you want to do. There may not be a system, you may have to install something to begin with. It is notable that that in the macOS Catalina release notes, Apple warns that future versions of the operating system may not include Ruby by default. This is also referred to as System Ruby, a version of Ruby that Apple provides with the operating system.
And that would certainly be new enough to use with Ruby on Rails 6. If you're using macOS Catalina or later, then you should have Ruby 2.6.3, that's what's installed by default. Ruby on Rails 6 requires Ruby version 2.5 or later. Once we have Homebrew installed, the next step is to ensure that we have a compatible version of Ruby that we can use with Ruby on Rails.
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