I am typing this on my late model 2008 Apple Mac Pro desktop computer. I've never had to backup my computer to do a fresh install and have never done a standard disk defrag yet my computer keeps chugging along as fast as it ever has, in fact even faster now since I installed 8 gigs of RAM. I've had to replace the graphics card and chose to upgrade the ram as mentioned but nothing else. As Apple says - it just works. Well all that seems to be changing because Apple has now dropped my computer from the regularly supported computer list and I'm stuck using an older iOS. How old is your Apple and how has it been working for you? Will you buy another Apple?