Hi All. Im a bit concerned about the RAM usage for my late 2013 15" rMBP I opened up Activity Monitor and was bewildered to see that I am using 14.5GB of my 16GB installed Ram. The only Main Apps I have open were 3 Chrome Tabs (including the one I am using to post this message) and iTunes. I am confused as to why even with chrome open it is using so much memory. thoughts?