I am trying to reset my mac to factory settings. There was an error on the HD so I used disk utility to repair the HD but this did not work so erased it. I don't have to original disks so tried to use Recovery HD but this did not work. When using Command-R nothing happened and a black screen appeared saying there was no disk to boot from! I then downloaded the Recovery Assistant from Apple and set up my HD as a recovery disk. I used the option button on start up and entered recovery mode this way. I have tried to re-install Mac OSX using the recovery disk but whenever I try it says 'Mac OSX needs at least 2GB of memory'. I don't understand why this is considering the hard rive has been erased and there is no data on it! I have looked at the partitions and there are none on there other that the Macintosh HD one. Can someone please help? I also have no back ups of the computer (stupidly)!