Ruby无法在mac MLion上加载这样的文件

我正在尝试在ruby中安装gems，因为我正在阅读ruby的入门书，当我在终端上安装它时，我需要安装redcloth，但当我更改为irb时，会发生这种情况

1.9.3-p194 :001 > require 'rubygems'
 => false 
1.9.3-p194 :002 > require 'RedCloth'
LoadError: cannot load such file -- RedCloth
    from /Users/AlbertoRdz/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /Users/AlbertoRdz/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from (irb):2
    from /Users/AlbertoRdz/.rvm/rubies/ruby-1.9.3-p194/bin/irb:16:in `<main>'

---

您需要按以下方式修复它：

需要“红布”

MacBook-de-Jesus:rubygems-1.8.24 AlbertoRdz$ which redcloth
/Users/AlbertoRdz/.rvm/rubies/ruby-1.9.3-p194/bin/redcloth