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Ruby Build a Simple Ruby on Rails Application Getting Started with Rails Installing Rails (Mac)

Isn't Ruby Already Installed On Macs?

I thought Mac's already have Ruby installed.. I have Ruby 2.0.0 already on my computer. Also, RailsInstaller advices not to use the the installer on OSx Mavericks. Is there another way to install Ruby on Rails? Thanks!

2 Answers


Yes, Ruby comes installed on every Mac now. But--installing RoR is a big deal, and you'll need to proceed carefully. Here's one step-by-step for installing on Mavericks: https://gorails.com/setup/osx/10.9-mavericks

Nick Stoneman
Nick Stoneman
10,093 Points

Thanks James.

I'd like treehouse to further explain this too. Environments and versions are confusing to the new programmer. As a novice, when I think of versions I assume backwards compatibility, as this is what years of being a consumer of software has taught me. The idea that the newest version isn't best - or that you need the exact version to follow along in an exercise - was counterintuitive to me at first and led to mistakes.

It's also confusing in general when OSX comes with Ruby installed. I would have found it useful if the video reiterated the difference between just having ruby (and xcode) and a proper ruby development environment.

Just my 2ยข

Agree. To be fair, though, I don't expect Treehouse to know and solve my specific environment, but I do appreciate it when they help--especially when it's a course necessity. It's probably too much to ask to have Treehouse deal with all the convoluted headaches of configuring each person's dev environment--nobody I know can do that.

That said: Ruby on Rails is a monstrously difficult thing to install. I'm amazed that it's as popular as it is. The ways that installation and config can go wrong--requiring reinstall, etc.--are mind-boggling.