Hi all, Before this I am developed IOS application using XCode 4.2 which run under Mac OS Snow Leopard. But now I need to use XCode 4.4.1 which required Mac OS X version 10.7.4 or later. So, is it possible my documents or data for example my previous developed application source code, keychain certificates, sample codes and other important data will lose after I update Mac OS to OS X Mountain Lion? Any comments and suggestions are welcome. Thanks a lot.