Mavericks won't install because Macintosh HD "cannot be used to start up your computer"

Question

Mavericks won't install because Macintosh HD "cannot be used to start up your computer"

I've searched around, but I haven't found a solution yet. Any ideas?

MacBook Air (11-inch Mid 2011), OS X Mountain Lion (10.8.5)

Posted on Oct 22, 2013 8:06 PM

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Answer 1

Imp68

Level 4

2,672 points

Oct 22, 2013 8:10 PM in response to alexbethecoolest

http://support.apple.com/kb/TS3926

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Answer 2

Oct 22, 2013 8:19 PM in response to Imp68

Thanks for the quick response. I had already found this while searching for a solution, and it unfortunately didn't solve the problem. I'm in the process of backing up right now, I wanted to avoid reformatting and reinstalling, but it's looking like that might be my only option.

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