Hello, I have a 27" iMac from approx 2012. It has been upgraded to O/S Maverick.. But not any further. The performance seems to be very poor, slow to login and show desktop content, lots O spinning beach after. I have tried: -Power cycle -Deleting Caches (With several programs) -Cleaning desktop etc up. -pram reset -login items (4 is all that shows).... This is usless. -Drive is approx 1/4 used What I do notice... there are many items in the activity monitor, most of which I cannot really pin down to exactly what they are.... But there are MANY of them... each typically taking 3Mb of memory (not much) but as there are so many... its adding up. Is there an advanced way to clean up activity monitor items... not just kill them? HERE IS THE KICKER! If I create a new user account there is approx. 1/3 of the items in the activity monitor..... and boy does it login fast in comparison! What is going on here?? Should I be deleting my account and starting over. (I have affection for my username and would like to keep it). Please help, Tony H.