I am using osx 10.8.4 and has brew installed.

I followed the ruby/rvm installation instruction here: http://octopress.org/docs/setup/rvm/

rvm install 1.9.3
rvm use 1.9.3
rvm rubygems latest

It ran without issues and errors. When I checked the ruby version I got this:

$ ruby --version
ruby 2.0.0p195 (2013-05-14 revision 40734) [x86_64-darwin12.4.0]

It isn't what I expected. Did RVM automatically install higher version of ruby?

Here is the rvminfo

$ rvm info


    uname:       "Darwin mbp002.local 12.4.0 Darwin Kernel Version 12.4.0: Wed May  1 17:57:12 PDT 2013; root:xnu-2050.24.15~1/RELEASE_X86_64 x86_64"
    system:      "osx/10.8/x86_64"
    bash:        "/bin/bash => GNU bash, version 3.2.48(1)-release (x86_64-apple-darwin12)"
    zsh:         "/bin/zsh => zsh 4.3.11 (i386-apple-darwin12.0)"

    version:      "rvm 1.20.13 (stable) by Wayne E. Seguin <wayneeseguin@gmail.com>, Michal Papis <mpapis@gmail.com> [https://rvm.io/]"
    updated:      "53 minutes 28 seconds ago"

    interpreter:  "ruby"
    version:      "2.0.0p195"
    date:         "2013-05-14"
    platform:     "x86_64-darwin12.4.0"
    patchlevel:   "2013-05-14 revision 40734"
    full_version: "ruby 2.0.0p195 (2013-05-14 revision 40734) [x86_64-darwin12.4.0]"

    gem:          "/Users/antkong/.rvm/gems/ruby-2.0.0-p195"
    ruby:         "/Users/antkong/.rvm/rubies/ruby-2.0.0-p195"

    ruby:         "/Users/antkong/.rvm/rubies/ruby-2.0.0-p195/bin/ruby"
    irb:          "/Users/antkong/.rvm/rubies/ruby-2.0.0-p195/bin/irb"
    gem:          "/Users/antkong/.rvm/rubies/ruby-2.0.0-p195/bin/gem"
    rake:         "/Users/antkong/.rvm/gems/ruby-2.0.0-p195@global/bin/rake"

    PATH:         "/Users/antkong/.rvm/gems/ruby-2.0.0-p195/bin:/Users/antkong/.rvm/gems/ruby-2.0.0-p195@global/bin:/Users/antkong/.rvm/rubies/ruby-2.0.0-p195/bin:/Users/antkong/.rvm/bin:/Users/antkong/.pythonbrew/bin:/usr/local/bin:/usr/local/share/python:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin"
    GEM_HOME:     "/Users/antkong/.rvm/gems/ruby-2.0.0-p195"
    GEM_PATH:     "/Users/antkong/.rvm/gems/ruby-2.0.0-p195:/Users/antkong/.rvm/gems/ruby-2.0.0-p195@global"
    MY_RUBY_HOME: "/Users/antkong/.rvm/rubies/ruby-2.0.0-p195"
    IRBRC:        "/Users/antkong/.rvm/rubies/ruby-2.0.0-p195/.irbrc"
    RUBYOPT:      ""
    gemset:       ""

are you sure rvm use 1.9.3 worked properly and there was no error displayed?

you can run this to be more sure:

rvm use 1.9.3 && echo "Got 1.9.3" || echo "Failed switching ruby!"

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