xcode9.2 objective-c install (mac 10.12.6)

1. xcode下载：

https://download.developer.apple.com/Developer_Tools/Xcode_9.2/Xcode_9.2.xip

2. 点击默认安装即可

3. 安装Alcatraz

  1）rm -rf ~/Library/Application\ Support/Developer/Shared/Xcode/Plug-ins/Alcatraz.xcplugin

       rm -rf ~/Library/Application\ Support/Alcatraz/

  2）curl -fsSL https://raw.github.com/supermarin/Alcatraz/master/Scripts/install.sh | sh

  3) sudo gem install -n /usr/local/bin update_xcode_plugins

  4) update_xcode_plugins --unsign     ###输入Y


  5) sudo gem install -n /usr/local/bin update_xcode_plugins

  6) 如果上面报错，可执行下面命令：

      gem sources --add https://gems.ruby-china.com/ --remove https://rubygems.org/

      gem sources -l

      参见地址： http://gems.ruby-china.com/

  7）效果图：

xcode9.2 objective-c install (mac 10.12.6)

原文：https://www.cnblogs.com/foreverstars/p/9691515.html