Hello I have a Mac Book Pro that I need to reinstall the OS. I have erased the data on the drive from the drive utility and now about to reinstall the OS but it required me to enter the apple ID and password and then I get This item is temporarily unavailable. I tried a few things such as making sure the format of the drive was Extended and Journaled, tried a another apple ID and no luck. I have another Mac Book Pro right here that I just reloaded but this system didnt require me to do the apple ID and it running os 10.8.5. Any suggestions or what I am doing wrong??