I am pretty mac illiterate....I've have the 'snow leopard' version of OS X for years, but I just upgrated to the 'mountain lion' because I'm trying to install a home architect software program on my mac and the software requires at least v. 10.8 or higher.... I think I installed the iOS 10.8 correctly, but now when I try to activate the 'home designer' software I get an error message that says: "an erro occured while attempting to register or deactivate chief architect'. this is likely caused because you don't have administrative access to this computer." I am the only 'adminstrator' on the computer. I tried going to system prefs and changing the setting to allow access to applications from anywhere instead of just mac app store. This didn't solve anything. Any help would be appreciated!