IOS 10 upgrade does not have a true machine test could not find Developer Disk Image

After IOS upgrades to 10, you will find that you are unable to perform a true machine test. I also encountered this in the iOS 8.4, 9.3 update. The reason is that the iOS 10 SDK is missing from Xcode's devicesupport. So you can choose to update the Xcode to the latest version on it, it is now necessary to update to Xcode 8. But Xcode update speed you know, fast one or two hours, slow time may take a day or two. and downloaded from the network Xcode is not the line, the lesson we have seen.
Another option is not to lack the iOS 10 support files, we directly to the lack of documentation to guide it.
Could not found Developer Disk Image steps are as follows: find a Mac that's already installed XCode8 the Finder find the application folder inside find Xcode click Xcode, right button, display package content Conten Ts-->developer-->platforms-->iphoneos.platform-->devicesupport
/applications/xcode.app/contents/developer/platforms/iphoneos.platform/devicesupport And then you can see some of the system models for your Xcode-supported real-machine tests. corresponding files
Drag the 10.0 folder you found to the XCode7 directory. 10.0 File

What, you say you do not have 10.0 folder to find a colleague or a development friend to be able to, the path and the same as above friends and colleagues did not, well, really not, I have one here. IOS 10.0 Devicesupport (GitHub) (under the directory Xcode, after downloading and then put it in your corresponding directory) 10.0 (14a345) Link: https://pan.baidu.com/s/1gfNplYV Password: 6CTP Tips

The most recommended practice is: If the update failed in the app Store, you can download the installation package directly from the website.
https://developer.apple.com/downloads/
Reference Articles

If you do not understand, you can take a look at the following article, written in great detail.
Jane Book-xcode 7.1 True machine test could not find Developer Disk image-mo Crazy

Http://www.jianshu.com/p/a11ac42f75c3