If you intend to upgrade your Mac to macOS High Sierra and keep using Parallels Desktop for Mac, we strongly recommend you upgrade to Parallels Desktop 13 for Mac.
Here is the list of known issues we are working on with the available workaround that we have tested in our lab.
|Video artifacts when switching desktop spaces in Full Screen mode.||Fixed in macOS update 10.13.2|
|Parallels Tools system extensions are blocked in macOS High Sierra VM.||In macOS High Sierra VM open System Preferences > Security & Privacy > General > click 'Allow'. See KB 124244|
|Cannot deploy Parallels Desktop to Macs with macOS High Sierra (host OS).||See KB 124289|