MAC 比较贵，虚拟机的干活。。。。。
配置完虚拟机。进去后 ，安装XCode的 时候 ，失败了。错误信息：
But when i have tried to install the Xcode it is showing "A Unknown error occurred. See the install log for more details".
解决办法：
Simply right click and show content -> Resource -> Package manually install the mobile device