Currently Being ModeratedJan 10, 2013 6:03 PM (in response to Xalland)
I'm having this issue too. I'm working on a MBP Retina w/ 768 SSD and 16GB RAM.
The problem happens when I'm adjusting wireframes as well and moving points along the keyframe. I have activity monitor open and my cores are doing nothing but the computer is unresponsive.