Xcode8 download iOS 9.3 Simulator fail
<p>I downloaded many times, sometimes prompt network problems lead to the failure to download，sometimes prompt "Could not download and install iOS 9.3 Simulator. Failed to mount image: no mountable file systems"。 </p>

<p>I try to copy from other computer installed the simulator, the path "~/Library/Developer/CoreSimulator/Devices" file copy to come over to cover all, still is invalid</p>