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The machine just goes to the grey screen, the wheel spins, and it turns off. Pressing 'C' or 'Opt - Command - P - R' or holding down the Power button for a while and then restarting, or trying 'Command - V'. I restarted, to boot from the startup disk, not the CD.Īnd now it just goes to the grey screen and shuts off. Mac OS X couldn't be installed on this disk.'

I got the error, 'The contents of this disk can't be changed. OS X :: Contents Of This Disk Can't Be Changed Mac Couldn't Be Installed On This Disk Oct 4, 2009

Could not unmount disk osx