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macOS Sierra 上的ruby版本为 ruby 2.0.0p648, 但是在安装cocoapods的时候，提示 activesupport requires Ruby version >= 2.2.2。
All of the games featured here were tested on at least our 3 in-house models below (although several other machines were tested thanks to other members of the Mac Gamer HQ team): iMac (5K, 27-inch, Late 2014): 3.5 GHz Intel Core i5, 8 GB RAM, AMD Radeon R9 M290X (2GB). Open up the terminal. The terminal application on macOS is an operating system command line. DeviantArt is where art and community thrive. Explore over 350 million pieces of art while connecting to fellow artists and art enthusiasts.
有两种办法安装新版本的ruby：
一： 使用Homebrew来安装，如果没有安装Homebrew的话，首先安装
$sudo ruby-e'$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)' |
安装完成之后在终端执行如下命令来安装ruby
2 | $brew install ruby |
安装完成之后，需要添加ruby到环境变量即可。 Flying bug smasher mac os.
Stare at a cylinder mac os. 二：使用rvm(Ruby Version Manager,Ruby版本管理器)进行安装，推荐使用这种方法。首先安装rvm：
测试是否安装正常
然后安装ruby
