imacmac-appstoremacos
I bought my iMac a month ago and it was already set up correctly. I had to run an update on Mavericks and that was it..
After a while "OS X Mavericks" appeared on the App Store, and i can download it..
My Question is… since i HAVE Mavericks – what will the installation do ?
Will i loose my files and settings if i go further installing it or will it just run and leave everything as it is.
What am i missing ?
The Reset cache solved my problem in the iTunes advanced preferences:
Since then I can install and upgrade applications from AppStore.
Yes, this should be fine, although I have not tested it specifically. After you install another copy of Mavericks for your friend's computer, the first time your friend logs into the Mac App Store/Software Update on his own Mac with his Apple user ID and password, it should register that he has a functioning copy of Mac OS Mavericks.
To make sure, it might be better to first have your friend log in to the Mac App Store to "purchase" the free download for the Mavericks installer, and then cancel the download as it begins. Then you can copy your installer to his hard drive (onto his existing installation of Lion or Mountain Lion) and run it from there.
I used a similar method with Mac OS X 10.7 Lion and Mac OS X 10.8 Mountain Lion; in that case, I had friends pay for the upgrade in the Mac App Store, without actually downloading anything. Then I transferred my copy of the Mac OS X installer to their Mac from my external hard drive, and I ran an installation in the usual manner. Apple and the Mac App Store did not care where the installer had come from, as long as the registered user had paid for the download beforehand.
But in this case the Mavericks download is free, so even that is no longer a problem.
Best Answer
The OS X upgrades on the MAS are very different than all other products.
It is an installer as opposed to the actual program that you run.
What is available is the chance for you to re-download the installer before you need it and save a copy. Apple initially made it hard for people to re-download the installer - presumably since many are equally confused as you are. However, lots of people were confused on how to re-download the app and a change was made a while back to show it as a download to anyone that "purchased" an upgrade.