1.修改SDKSettings.plist
路径: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/SDKSettings.plist
修改SDKSettings.plist为可读可写
保存之后重启Xcode8,之后在工程的Deployment Target里面就可以选择7.0
2.相应系统调试需要的配置文件:
目录:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport