I remember a while back I heard that in OS X you will almost always see you have little "Free" memory. Someone explained to me that this is because OS X, is designed to use all the memory it has to make OS X as efficient as possible. Now im trying to tell a friend why my mac always has little free memory and that I dont need to buy more RAM. Anyways i dont know enough on the subject to explain it well enough to convincce my friend. So im hoping someone here can. So shed some light on this subject for me please?