After 30 years of PCs, I purchased my first Mac computer, the 21.5" 3i, in January. I like many things about it, but recovering from sleep is not one of it's virtues. After leaving it over night, it takes about 40 minutes for my Imac to get back to what I would consider normal speed. From what I can tell, this is a problem with Apple computers, notebooks and desktops, that goes back at least five years, and for which there is no permanent solution. Or if there is a solution, Apple has not seen fit to implement it.