Why am getting the error "An error occurred while preparing the installation. Try running this application again." when I try to install Mountain Lion?
I am trying to upgrade a family members macbook pro to 10.8 but getting the following error: An error occurred while preparing the installation. Try running this application again.
Any suggestions?
I have already done a software upgrade. All that was needed a was an iTunes update.
MacBook Pro, Mac OS X (10.6.8)
