For the most part, Macs don’t crash as much as other computers. One reason for that is that the Mac doesn’t have to contend with an unpredictable mix of hardware and software: OS X is highly optimised for the machines that it runs on. In addition to that, OS X does a pretty good job of cleaning up after itself.
Still, occasionally, things do go wrong with a local disk drive and you’ll need to repair it to get your machine back in showroom condition. Here, we’ll show you a few ways to diagnose and repair corrupt and ailing drives, mainly using tools that are baked right into Mac OS X.