Hi there, I own the 2.6GHz 16GB RAM rPro. Whilst playing minecraft - allocated 4GB system RAM to the application, when running/using other applications with MC open the system feels incredibly laggy where text fails to appear on screen as you type. After looking at my activity monitor whilst doing this I'm at around 86% CPU Idle along with 7GB Free RAM. This problem is also noticeable while using VM in either Ubuntu or Win 7 - 2CPU cores with 4GB RAM allocation where the activity monitor is showing similar figures. Would anyone mind explaining why this happens and what I can do to alleviate this problem? Thanks!