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Mountain Lion will not install on MBP (late 2011) Macintosh HD: "This disk cannot be used to startup your computer"

1277 Views 4 Replies Latest reply: Aug 4, 2012 8:13 AM by JMN51 RSS
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Jul 31, 2012 8:44 AM

Tried to upgrade from 10.7.4 on relatively new MBP. It appears that Mountain Lion successfully downloaded from App Store. However, ML will not install to the hard drive because "This disk cannot be used to startup your computer". Thanks for advice.

MacBook Pro, OS X Mountain Lion


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