安装红宝石1.9.3与Rvm的问题

Question

我想安装红宝石1.9.3使用本指南：http://www.moncefbelyamani.com/how-to-install-xcode-homebrew-git-rvm-ruby-on-mac/。

当我运行rvm install 1.9.3我得到这个错误

Searching for binary rubies, this might take some time. 
No binary rubies available for: osx/10.8/x86_64/ruby-1.9.3-p392. 
Continuing with compilation. Please read 'rvm mount' to get more information on binary   rubies. 
Installing requirements for osx, might require sudo password. 
Skipping `brew update` make sure your formulas are up to date. 
Cowardly refusing to continue, please read 'rvm autolibs'. 

然后我跑brew update，我得到

Already up-to-date. 

而且我试图运行brew doctor，我也得到

Your system is raring to brew. 

什么是错的？我该如何解决？？

Answer 1

我有同样的问题，这个工作对我来说：

\curl -L https://get.rvm.io | bash -s stable --rails --autolibs=enabled 

来源：

https://rvm.io/

Answer 2

尝试：

rvm list known 

如果不返回任何内容，或不包括你正在寻找尝试红宝石版本更新

rvm get stable 

然后尝试安装你想要的红宝石版本再次。