I recently purchased the regular addition of Parallels for my Mac 5k Retina running Sierra with 32 gigs of ram and 4 gigs of video ram. I have only had Parallels installed for about a month for my daughter to play some of her favorite games. Now Parallels is flashing. The whole screen is flashing endlessly. I read it was the video memory so I increased it to 2 gigs. Still flashes. Not even happy about it.
