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Origineel bericht door: ishii106 ,


do you have OS Lion installed?

try holding down the option key after the macpro boots up and your screen turn on before the apple logo pops up.  if you succeed, you'll get an option of choosing your Mac HD or Recovery HD.

IF you can get to that, it's OS corruption so you can go through the Utilities in Recovery side of your HD.

IF you can't get to where you get the option to choose which HD to boot from, it's probably your HD hardware.  Then you may have to install OS on other HD then try to transfer files from the old one if you're lucky enough to get access to it.

good luck