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I'm pretty sure it's hosed :(:mad:. I have tried partitioning through disk utility and through command prompt...each time getting some new error for me to search Google for. The most recent error is an input output error. I actually managed to erase the drive through command prompt, but...

unfortunately, no matter what i do it always gives me the error of "could not unmount disk"... i have tried erasing through disk utility and through command prompt. i fear my computer is a brick, or i have to take it to the shop. any other suggestions? thanks so much for your help so far.

hi deltamac, thanks for your reply. i attempted all of the above, but unfortunately it gives me an error when trying to reinstall os x "an error occurred while preparing the installation". i tried the fix of opening the command prompt to check if the date and time were correct, and...

Hi all, this is my first post. thank you in advance! my mid-2009 MBP running Mavericks won't boot up past the grey screen and load wheel. this happened after i had to force shut-down with the power key b/c the computer had frozen. i rarely do this, but the handful of times i've done this in...