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- Nov 22, 2014
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I decided to upgrade my MacBook pro from Snow Leopard to Yosemite and now I am stuck. Yosemite wants to install on the ‘Macintosh HD’ partition but can't. I should say that ‘Macintosh HD’ is the largest of 3 partitions and I think the only one on the physical drive on which it reside and it takes up nearly all the drive space; other 2 are much smaller and on different disk I think - an OS X Install ESD partition at 1.3 GB and an OS X Base System partition at 5.4 GB. Getting back to the install, the process dies because it is unable to verify/repair a problem with the Macintosh HD partition. The install will begin (says it will take 22 minutes) then fails. Other times, it tells me the drive is locked and it can't begin the install on the ‘Mac HD’ partition. This leaves me in OS X Utilities limbo land. I figured I would erase the Macintosh HS partition and reformat it in the hopes the bad sectors on the drive would be marked and then the install could process. Can’t do this either. When I try to erase, It tells me the drive can’t be un-mounted. I even tried to un-mount from the command line using the terminal utility – no go. I have managed to restore/copy the ‘Macintosh HD’ partition to an external HD so I am hopeful my data is protected. Full disclosure - I am not an Apple OS person and my logic may not be correct which is why I am posting. Other constraints, I am working in Mexico and won’t be back to the states until mid-December. There is no genius bar where I am working otherwise I would have dumped this in their lap. There is an Apple store at a mall near me but that’s it.