So we upgraded the wifes iMac 27" to Lion a few weeks ago and she has been complaining that it is running slow. I have a new Macbook pro that runs Lion fine; on paper, the iMac is faster but it runs like a pig! she only really uses safari and iPhoto and maybe the odd word document and I just cannot understand how it has slowed down so much - I thought it was only Windows machines that slowed down after use? Any ideas what I should be looking for? could it be the iMac itself?