Could not locate device support

升级 iOS 12之后，使用 Xcode 9 提示:
Could not locate device support files
This iPhone 6 Plus is running iOS 12.0 (16A366), which may not be supported by this version of Xcode.

iOS 真机调试包集合，包含 iOS 12，下载地址：https://pan.baidu.com/s/1lav6Xiy16lpEA9lUl16m6w 密码: w53z

打开 Finder，按下 command + shift + G，输入 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport，将文件解压到这个目录，如图：

原文地址：http://www.exchen.net/ios-%E7%9C%9F%E6%9C%BA%E8%B0%83%E8%AF%95%E5%8C%85%E9%9B%86%E5%90%88-%E5%8C%85%E5%90%AB-ios-12.html