Nothing mentioned in the previous comment is indicative of a hardware problem. If you think I'm wrong, please describe a plausible mechanism to cause any of the problems described above. They all are plausibly software bugs. I mean, Apple hardware is not really any better than any other piece of fallible hardware, and their OS has been a buggy mess since Apple DOS. Most pieces of software as large as an OS are buggy in many ways, and Apple has not been proven to be the exception.