At least the newest one (a 6 month old 13" aluminum) is working OK. The two year old white Macbook just stopped operating for no reason again today. Gray screen. Tried to start with Snow Leopard discs. Nothing. Same issue as when I took it in a while back: http://forums.macrumors.com/showthread.php?t=874722 Meanwhile, the 4 yr. old HP laptop that cost half the amount of the Macbook has never had a glitch or a repair. Just magical, Steve.