Hi, I've got a question regarding physical memory usage on my 15" 2.4GHz SR/2GB Macbook Pro. I understand memory management on Windows, but I'm not totally clear about OS X's. I have 2GB of RAM in this machine, and when I run paralells and/or Photoshop with Firefox, Adium, Mail, and aybe Pages/Transmission, my physcal ram availability is totally decimated. What I don't understand is why the physical usage of each process in Activity Monitor don't add up to nearly what is apparently being used. See the screenshot: Could somebody fill me in on this? I'm sure somebody's asked about this before but I couldn't find an exact match with a forum search. If you could link to a response that would be great. I appreciate your help! Thanks in advance.