Title says it all. Disk Utility tells me I cannot delete either of the partitions. But I'll explain why this happened. I had Lion on this mac, but something about the OS caused the computer to have issues shutting down/restarting. I decided to revert to Snow Leopard, as I don't own Lion...I bought the computer off Ebay...I created a new partition, and installed Snow Leopard on it, then deleted the Lion partition, and attempted to make my 10.6 partition fill my HD space...To no avail. I couldn't find any way to do so on Disk Utility. So I had the (I thought) epiphany that I must have installed OS 10.6 on a secondary HD, and needed to install it on the same Partition that Lion was on. Ah, so now I have two partitions, both with Snow Leopard, and I can't delete the "secondary" partition using Disk Utility. Is there any way I can delete one of the partitions and cause the other to fill the free space? Thank you.