I have a Mac that I'd like to sell. I have not had any problems with it, but I have not had it that long. So, I want to make sure that it is in tip-top shape before selling it for two reasons: - 1. I want my customer to be happy with the purchase. - 2. I don't want to have to deal with any follow-up issues (of course, I am selling "as-is," but I do want to minimize any headaches for the buyer or me. So, how should I go about doing this? Is Apple hardware test, run overnight in loop mode, the best way to go? I've visually inspected everything. There are no bulging cap's, leaks, or anything like that. The combo-drive was questionable, so I replaced it with a DVD-burner. How can I test the reliability of the burner, other than burning some discs?