I got the tip that switching the Parallels graphics options to DirectX 9 solves the problem and it worked like a charm. See https://forum.parallels.com/threads/minecraft-for-windows-10-does-not-work-at-all.342636/Don't mind the post that says that you have to create a new VM, for me it worked with an existing VM.
It might still be of interest for Mojang that there are some Parallels DirectX 10 issues.
Kai Widmann
I got the tip that switching the Parallels graphics options to DirectX 9 solves the problem and it worked like a charm. See https://forum.parallels.com/threads/minecraft-for-windows-10-does-not-work-at-all.342636/
Don't mind the post that says that you have to create a new VM, for me it worked with an existing VM.
It might still be of interest for Mojang that there are some Parallels DirectX 10 issues.