http://blog.csdn.net/xiaoluodecai/article/details/48649697
After updating the latest Xcode, always keep only the latest emulator, such as iOS9.0, if you want to add a previous version of the emulator such as 8.4, you can do this in the following ways:
1. Download the old emulator version:
: Http://pan.baidu.com/s/1bnykwzl
Download down is zip file, unzip , build iOS x.x.simruntime
Files like that.
2. Find the address of the new Xcode store Simulator SDK:
On my computer, the address is
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Library/CoreSimulator/Profiles/Runtimes
If the address is not correct, try this address:
/Library/Developer/CoreSimulator/Profiles/Runtimes/
If you can't find it, find the file command with the powerful Linux:
/ -name ‘iOS 9.0.*‘
The command means looking for files with the name iOS 9.0.xxxxx in the root directory. This is where you will be able to find the address of your latest version of Xcode simulator, which I found in this way.
3. Place the extracted iOS x.x.simruntime to the address found in the previous step
You may need to enter the administrator password here.
4. To restart Xcode, you should be able to find the corresponding simulator under Xcode's Window-devices menu, to complete the entire step. 5. Possible problems: 1.ios Simulator does not display the system version, the rear is the device ID
The problem lies in:
A duplicate emulator appears, causing Xcode to show an exception.
solve the problem:
The solution is very simple, that is to open the device, delete the duplicate simulator can be solved! (window–>devices)
This question refers to the http://my.oschina.net/shuoit/blog/478746
Xcode7 new version of the Emulator method