Guys, sorry for this confusion. There are several issues with the view modes, some of them were fixed in the released 12.0.2 hotfix, but some are not yet. Let me please clarify the situation a bit. Up to 11th version, we have used our custom Full Screen mode in Parallels Desktop for Mac, which basically did not use system's native Full Screen, but instead, we were just showing a borderless window resized to full display size. It had its benefits, but in Parallels Desktop 12 for Mac we dropped support for non-native macOS Full Screen mode, as it caused a lot more issues while playing games, working in CAD software and in similar use cases. Once Parallels Desktop for Mac switched to native macOS Full Screen mode, the behavior changed: now instead of the VM on external display a black screen appeared - and this is native macOS behavior. Try to enter Full Screen mode with TextEdit - you will get the same black screen. Why macOS disables the second display? God knows.. There are a lot of discussions on Internet about that: https://discussions.apple.com/thread/3196329?start=0 http://apple.stackexchange.com/ques...-2-when-an-application-is-maximized-on-monito To make two displays having separate spaces in macOS, Apple developed an option in System Preferences (thanks to them) - Displays have separate spaces. After enabling this option (don't forget to log in/out) you won't get this black screen anymore - the external display will have its own macOS space. If you'd like to have your VM on both displays - enable 'Use All Displays in Full Screen' option in VM 'View' menu (see http://kb.parallels.com/en/111936) If this is not your issue, but you have multiple black spaces named with Parallels Desktop on one or several monitors - this is indeed an issue with our software, and we are already investigating that. I'm sorry for all this mess with the view modes, I hope you're gonna love other improvements we made in Parallels Desktop 12 for Mac.