I bought it at a yard sale today for $40. The problem is the guy lost his set up disc. I also bought an iMac G5 for the same price and it had the discs with it. Neither Mac was wiped out when I bought it. I wiped out the G5 no problem with the discs. The 2011 iMac will not take the disc though because it's older software. I tried download el captain to wipe it out on the 2011 Mac because it's compatible but it's saying I cannot download it even though it meets the requirements. How can I wipe this computer without having the snow leopard dvd. It's on OS X 10.6.8 right now.