I know, search the forums - did that. Let me explain - earlier this morning my MBP (Mid-2010) froze so I held the power button down and restarted. It only went to the gray apple screen so I went through DU from my snow leopard disk and couldn't resolve the problem. I've had issues with this HDD before so I went to best buy and bought Seagate Momentus XT 500gb to replace the old 250gb that was almost full anyways. I installed the drive, but now I cannot erase or partition the drive. I'm constanty receiving "The operation couldn't be completed. Cannot allocate memory." I've done everything I could find on forums including using terminal to wipe the drive. All I want to do is install snow leopard so that I can install lion and then restore from TM. So what option do I have, other than putting the drive in a windows machine that I don't have or a case for the HDD? Or using tiger, that I don't have. Feel like I'm screwed.