According to rvm requirements, \"For Ruby 1.9.3: Install libksba # If using Homebrew, \'brew install libksba\'\"
I am completely new and am not familiar with termina
you need to install the command line tools of xcode. Then you don't need to install libksba.
http://blog.salientdigital.com/2012/05/16/how-to-fix-no-acceptable-c-compiler-found-in-path-on-mac-os-x-lion/
Best, Olli