I am wondering if there is any difference between the 2 methods: 1. Log in as an administrator and proceed with software installation. 2. start the software installation in "non-administrator" user status and authenticate by entering your administrator's user name/password before software installation (as the installation typically prompt you to do so). Either method can achieve proper software installation with OS X. But, is #1 better than #2? Or, does it make any difference? For certain applications, #1 is the better way, I think.