From: Ryan Davis <ryand-ruby@...>
Date: 2012-09-15T03:17:57+09:00
Subject: Re: Ruby 1.9.3 and OS X Mountain Lion

Don't bother uninstalling. It'll just come back in updates.mapple leaves /usr/local completely alone, so edit /etc/paths to have /usr/local/bin first. Then, install Xcode via the AppStore so you can compile ruby and gems with c extensions. Then install Mac homebrew and use that to install ruby 1.9. Rvm is nice in certain contexts but really isn't necessary and overly complicates things.

On Sep 14, 2012, at 11:11, sto.mar@web.de wrote:

> Hi all,
> 
> I am using Ruby in an introductory computer science class in Highschool.
> Of course, to keep things simple, I would like all my students to use
> the same Ruby version (1.9.3p194).
> 
> At school we use W*****s machines and most of the students also use it
> at home, but a few use Linux or OS X. Myself, I'm a convinced Linux user
> so I do want to encourage my students to use a non-W*****s operating
> system.
> 
> Problem is I have never used OS X and need some help from you
> experienced users out there:
> 
> it seems that by default Ruby is already installed on OS X, but in
> the wrong (for our purposes) version, 1.8.7. I think the student
> who pointed that out to me uses Mountain Lion (maybe Lion).
> 
> What would be the least painful option, in your opinion:
> 
> - somehow uninstall the preinstalled version and install 1.9.3
>  (I fear this could break the system, assuming Ruby is
>   needed for some system tool(?) since it's already installed)
> 
> - install rvm
> 
> - ...?
> 
> - tolerate that students use different versions
>  (this might mean higher effort for me when providing
>   unit tests for programming tasks etc.)
> 
> Any hint is highly appreciated.
> 
> -- 
> <https://github.com/stomar/>
>