A note for those who were confused by the previous entry: the Mac shows a floppy disk with a blinking question mark if it can’t boot off the hard drive. It’s an ancient relic of a time when, if you didn’t have a working hard drive, you were asked to boot off a floppy. Apple hasn’t shipped a Mac in years that can boot off a floppy, but the icon hasn’t changed, and it still means that your hard drive is toast.