I\'m trying to implement a gamecenter aware app targeted to iOS 6. To give some info on the environment I\'m working on mac os 10.7.5 with XCode version is 4.5.2 and xcode is ru
I know this question references specific Xcode and iOS simulation versions, but if your simulator is already logged in one account, and you don't mind losing whatever data you've got on the simulator (chances are small, but you never know), you can simply reset the settings and data on it.
Go to: Simulator -> Reset Content and Settings...
...and confirm the action when prompted.
This is certainly true for Xcode7.x running an iOS 9.x simulator, someone else might be able to verify whether it's true for earlier versions (especially as I've unearthed quite an old question and answer).
Necrothreadomancy: +1