macOS Sierra - graphics problems

ManuelF3

Bit poster
After a bit of a struggle, I was able to create a Sierra (10.12.6) VM on my MacBookPro running High Sierra.

The graphics for at least Chrome and Spotify are not working correctly. I get either strangely rendered pages (Chrome) or black areas (Spotify) making both applications unusable. I tried increasing the video RAM to 512MB and still no go.
I have a MacBook Pro Early 2011 with High Sierra 10.13.1 and Parallels Version 13.2.0 (43213).

Can anyone help?
 
I tried that though a previous email. Parallels technical support had a live interactive session with me and took control of my Mac to try some things. It was concluded that this issue cannot be fixed.
 
I have the same symptom, installed a Mac OS X (Mojave) guest in parallels. But some elements of graphic, such as tabs on Safari, Terminal, Chrome are flickering and not updating. Traces of the mouse shows when hovering over. I tried: reinstalling Parallels tools, changing resolutions, different options for graphic memory, and all combinations of settings available in Parallels -> Settings -> Hardware -> Graphics. Also tried reinstalling Mac OS Mojave, and then various combinations of settings in Mac -> Settings -> Accessibility. The issue seems to be related to the graphic card.
 
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