My MacBook Pro has gone south. I cannot pinpoint the issue, but something is keeping it from booting. Apple can't do much because it's 6 years old, outside their window of support. Since it exhibits the same behavior from four different hard drives with four different versions of Mac OS X, and while trying to boot in recovery mode over the Internet, I, with agreement of an Apple tech I got some phone support from, determined the problem is not associated with hard drives or the operating system. Until I can get a suitable replacement computer photos are on hold.