如果您使用的是Xcode 7 GM版本 7A218 ，则机会很大您不小心下载了iOS 9.1（ 13B5110e ），而不是iOS 9 GM版本（ 13A340 ）。我做了同样的事情，不用担心。他们太接近了下载页面上的彼此：0

If you are using the Xcode 7 GM build version 7A218, the chances are that you accidentally downloaded iOS 9.1 (13B5110e) as opposed to the iOS 9 GM build (13A340). I did the same thing don't worry. They are too close to each other on the downloads page :0

您只需转到设备设置>常规>关于>版本

You can check which version you have on your device by simply going to your device Settings > General > About > Version

您所要做的就是下载正确的iOS 9 GM版本和转到iTunes。单击您的设备。在摘要选项卡中， OPTION +右键单击检查更新并通过导航到iOS 9 GM构建查找器位置来恢复设备。 注意选择检查更新，您将不丢失设备上的任何设置或数据。换句话说，它不是恢复

All you have to do is download the correct iOS 9 GM build and go to iTunes. Click on your device. In the summary tab, OPTION + Right Click "Check for Update" and restore your device by navigating to the iOS 9 GM build finder location. Note by selecting "Check for Update" you will not lose any settings or data on your device. In other words, it is not a restore

但是，如果您使用Xcode 7.1构建版本（ 7B60 ），则支持iOS 9.1

However, if you are using Xcode 7.1 build version (7B60) iOS 9.1 is supported