My iMac is running very slowly. Suggestions?
My iMac (2009, 2.66 GHz, Intel Core 2 Duo; 4GB) is running more slowly every day. I have an app called Memory Clean that shows the amount of memory, which fluctuates all the way from around 2GB down to 50MB sometimes. I'm wondering if I need to add more memory. If that's the case, what's the best way to do that-- DIY or take it to the Apple Store (I have one locally). Thanks!