I upgraded to macOS Sierra yesterday and am now experiencing corruption when using the edge web browser in my parallels boot camp VM. Text becomes smeared and unreadable after scrolling up and down pages a little. I was running parallels 11 at the time, and just upgraded to parallels 12 and the issue persists. Had no issues on El Capitan. Host OS: macOS Sierra 10.12 Guest OS: Windows 10 Anniversary edition x64 Version 10.0.14393 Build 14393, running from Boot Camp partition Macbook Pro 13" Early 2015 8GB RAM Core i7-5557u Iris 6100
Same problem here. Same Host OS upgraded to Sierra. Same Guest OS running from BootCamp partition. Same MacBookPro13. When booting with bootcamp (not using Parallels), I don't have the problem. With Parallels, only Edge is impacted. Chrome is fine.
I contacted Parallels support and the technician turned a bunch of settings off or down. His conclusion was that turning vsync off fixed the problem. I went back and played around with some settings to verify this. It turns out vsync doesn't help or hurt this problem, I did however find a workaround: Setting the VM Retina settings to scaled does not eliminate the problem, but it makes it happen much less often to the point that it is difficult to reproduce (it also makes the VM look pixelated, running at a max resolution of the "scaled" desktop, in my case 1440x900) Another, better workaround, so long as you don't run 3d apps that require directx10 is to set 3d acceleration from directx10 to directx9, when I did this the text corruption was completely eliminated. Setting 3d acceleration to off works too, but also makes even normal UI interactions very slow and choppy.
