Hello, I got an iMac 2011. Anyways, I've installed on it Mac OSX Lion 10.7.2 Beta 11C57. But I can't seems to be able to upgrade to Final version of 10.7.2 I've tried downloading the final version on any direct link and on installation it says: Mac OS X Update can't be installed on this disk. This volume does not meet the requirements for this update. What should I do? :O Thank you very much!