I am a recent switcher. Before I got my mac pro, I had used Windows my entire life. Mac OS X is an infinitely superior operating system. My productivity has increased ten-fold practically. OS X is a pleasure to use, whereas Windows is absolutely painful. There is one thing I simply do not understand, though: Mac OS X's memory management. With 2 gigs of RAM, I was pretty regularly maxing it out, so I recently upgraded to 4. It has made a world of difference, but I still find myself maxing out my RAM and using the pagefile, yet I have 2+ Gigs of inactive RAM. Sometimes, I will have 3 gigs of inactive RAM, and my page outs will steadily increase. I just don't understand. I searched Google and the forums, and it seems like inactive RAM is supposed to be freed up when needed, but that doesn't seem to be happening. Is this normal? Is there anything I can do to free up that "inactive" RAM, or is the easiest solution to just buy more?