I have a late 2009, 21.5" iMac, running 10.9.4. It has a 3.06 GHz Core 2 Duo processor and 8GB RAM. The hard drive is only 32% full. Up until about a month ago, there has been no problems at all. I have been bragging to my PC colleagues that I'm using a 5 year old Mac, with no need to replace in the near future. However, recently, whenever I try and do anything - like load a website, open up a document, or (heaven forbid) try and do TWO THINGS at once, I get the spinning beach ball. Usually the beach ball goes away after about 2-3 minutes. But it's super annoying. It seems to mostly happen within 5 minutes of "waking" from sleep mode, or within 5 minutes of starting up. If this were 2004 and I were on a PC, I'd try defragmenting it. Is there something similar for Macs? I'd rather not buy a new Mac. Thank you for any advice!