osx 系统升级后，xcode 运行程序，打开模拟器提示：

Xcode cannot run using the selected device
No supported iOS devices are available. Connect an iOS device to run your application or choose an iOS simulator as the destination.

找了半天找到解决办法：windows->devices->   +   -> Iphone5s -> ok

图片就不上了，转载自：原创链接