I have been using the IOS simulator from XE5 for many weeks now, but suddenly it will no longer work. I get the error 'Wrapper init failed (null)'. The only thing that happened before the problem was I got a request to "update" from OSX. I said 'yes' and it appears XCode was updated but it does seem to work fine. PAserver starts OK.
When I went to options SDK manager and used the update local files cache I got the error Directory does not exist: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk/usr/include/
This appears to be an incompatibilty between the PAServer and Xcode 5.1 and SDK 7.1. The same happens with XE4.
The question now is can you roll back XCode with success.
I did roll back to Xcode 5.0.2 and everything appears to work OK.