I have been running a Win7 VM with no problems on my host i7 8GB/512GB Macbook Air running latest Mavericks update. I'm trying to move all of my work things to a Mac VM (still need a separate container to keep my personal items away from big company work items and VPN). So I created a Mavericks VM - everything seems to be working fine, but the video whenever I try to scroll in Mail.app or Safari seems to flicker. I've allocated 4GB of memory and 2 cores, so it can't be a resource issue. I've rebooted, and that is the only VM running....help!?