Hi Alexis I am having the exact same problem, I have a mac desk top thats only a few months old and SL is snail pace slow, I have tried getting some answers from mac but they can't help, everything else on my MAC runs great just not SL, I have tried lowering the graphics, clearing cache, you name it I have tried it but nothing works, and I have fibre optic broadband. If anyone can help on this it would mean so much to me, but everyone I have spoke to has no idea.