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Q: Yosemite "this disk cannot be used to start up your computer"

I'm trying to install Yosemite from the app store - when it asks me to "select the disk where you want to install OS X" it won't let me select Macintosh HD (my only option) because it says "This disk cannot be used to start up your computer" please help I don't know what is wrong!

MacBook Pro, Mac OS X (10.6.8)

Posted on Nov 9, 2014 8:45 AM

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Q: Yosemite "this disk cannot be used to start up your computer"

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