cant install spore from USB backup disk on new IMACS that have no DVD drive.
I am trying to test Spore on my father's new Imac but it will not let me install.
I copied the whole DVD content on a portable USB drive and I can install it fine from there via my own MAC but from my father's new IMAC 2012 that has no DVD drive I am greeted by the error.
"could not verify the integrity of the installer"
any ideas why?