I'm running Parallels Desktop 13 and run "macOS on macOS". My current setup is macOS 10.13.3 host and guest on a MacBook Pro 13" Retina 2016. Running "macOS on macOS" works well except that all web browsers I tried have problems. To get a crisp screen I use a "HiDPI" setting in the macOS display control panel. Google Chrome has lots of flickering. Tried some other browsers like Opera, Vivaldi and Firefox. Either they has the flickering too or other rendering problems. Not really usable. SeaMonkey seems to work ok and Firefox up to version 54.0.1 seems to work if doing a work-around, see https://bugzilla.mozilla.org/show_bug.cgi?id=1305656 Problem is that in my new setup with the latest Parallels Desktop and a newer Safari all works well except searhing for text on a web page. Then the whole page gets black except the text I search for that gets a yellow background. See image Note that Parallels Desktop share the above problems with another major virtualization product for macOS. I.e. this might be a general problem with how virtualization is done on macOS. Or possibly a webkit problem. Is there any work-around for this? Or something you plean to address in some future release?