问题提示：“ No devices connected to 'My Mac'”,无法连接当前设备
1.Quit Xcode(退出当前xcode工具)
2.Disconnect the device(断开USB连接)
3.In a terminal window, type: sudo pkill usbmuxd (it will be restarted again automatically)
(打开终端，输入“ sudo pkill usbmuxd ”命令,重置)
4.Restart Xcode(重新打开xcode)
5.Connect the device(连接USB设备)
真机调试包路径
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport