4 Replies Latest reply: Aug 4, 2012 8:13 AM by JMN51
JMN51 Level 1 (0 points)

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