Hello, ordered new iMac Friday, arrived today. It does not have Mavericks installed, so am downloading it from app store now. I'll then make a bootable USB key for the install. Question: when Mavericks is installed, how do I then claim free upgrades for Keynote/pages/numbers/iPhoto/garageband etc? App store says it wants to charge me, but these apps are free for iMacs bought after Oct 1st... Correct? How do I prove that to the app store? Also, if I format this mac in the coming years, will the app store "remember" to let me update again? Ideally I'd like the apps saved to the HDD, if possible.