My Macbook Pro (early 2011) came with Lion installed (no disks) and I want to downgrade to Snow Leopard. I don't care about saving my current data, I just want a clean install of Snow Leopard. My issue is I don't know which OS disk to buy. Do I need to buy OS X Leopard, install it, then update it to Snow Leopard? Or can I just buy the Snow Leopard retail disk? The reason I'm hesitant in buying the snow leopard disk is because it seems WAY too cheap for a full OS disk. The apple store has it listed for $27. My computer didn't come with any disks and I'm kinda new to Macs so sorry if this is a dumb question. Thanks