Ruby Install on mac with RVM

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在mac上用rvm安装ruby

homebrew

未装homebrew先装homebrew，否则报错

$ ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

如果有安装homebrew，但是在后面的ruby安装过程中出现如下错误

/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- mach (LoadError)    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'    from /usr/local/Library/Homebrew/extend/pathname.rb:2:in `<top (required)>'    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'    from /usr/local/Library/Homebrew/global.rb:3:in `<top (required)>'    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'    from /usr/local/Library/brew.rb:15:in `<main>'ERROR: '/bin' is not writable - it is required for Homebrew, try 'brew doctor' to fix it!Requirements installation failed with status: 1.

有可能是你更新mac系统造成的，我是通过卸载重装homebrew来解决这个问题的

$ ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/uninstall)"$ ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

开始安装ruby

通过安装rvm来管理ruby

$ curl -L https://get.rvm.io | bash -s stable

通过以下命令启用RVM

$ source ~/.rvm/scripts/rvm

检查一下是否安装正确命令

$ rvm -v # rvm 1.27.0 (latest) by Wayne E. Seguin <wayneeseguin@gmail.com>, Michal Papis <mpapis@gmail.com> [https://rvm.io/]

然后安装ruby，默认安装latest版本

$ rvm install ruby

也可通过$ rvm list known 查看可安装版本

安装完成后切换 Ruby 版本

$ rvm use 2.3.0

设置为默认版本

$ rvm use 2.3.0 --default

当切换版本报如下错：

$ Gemset '' does not exist, 'rvm ruby-2.3.0 do rvm gemset create ' first, or append '--create'.

在第一次使用某ruby版本时加上 –create即可，之后再切换就不会报错了

$ rvm --create ruby-2.3.0

At last，可以用$ rvm list 查看已安装的ruby版本，用ruby -v 查看使用的ruby版本

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