IOS Simulator failed to install the application

Question

I just installed OS X Mavericks then downloaded XCODE. Just to test it, I created a Single View Controller application. I went to the storyboard and added a label just so I could see something come up when I would run the app. I did not add any code. I ran the app which builds fine, but I then get a IOS Simulator failed to install the application. Rememer, this is a clean install of Mavericks, a clean install of XCODE and the first app created. I repeated this for a Master-Detail application and get the same result. I did not change any settings in XCODE from that which is installed by default. Just wanted to go through a build and run to verify things before I start writing a real app.
I checked the forums which talk about telling the IOS Simulator to Reset Content and Settings. This does not resolve it. I get a black simulator screen. There was other talk about removing a file: ~/Library/Application Support/iPhone Simulator
but that file does not exist. The forums also talk about building IOS 6 apps and then having a problem after building for IOS 7. But again, no default parameters were changed and it is building an IOS 7 app for the first time and has only been generating IOS 7 apps.
Any ideas why the simulator won't load any of the simple apps?

Answer 1

Since everything else I tried had failed, I uninstalled XCODE, reset the Mac then re-installed XCODE and the apps all started loading properly into the simulator. After I installed OS X Mavericks the first thing I did was install XCODE and made no configuration changes to it. Yet I had the issue reported. But now with reloading XCODE all seems fine.