Over the past couple of weeks i've noticed that iMessages is using up most of my systems memory. This is happening on my iMac mid 2011 with 16gb of RAM. Its been updated to mountain lion since the day it came out on the app store. Anyhow iMessages will use upto 12-14gb of ram until i force close it. Which in turn makes my pc run very sluggish with the beach ball popping up even while doing very simple tasks. Any thoughts on how to remedy this? Or should i just not use iMessages on my pc anymore?