By default in Fusion, global keyboard shortcuts that the Mac operating system or third-party applications have registered are sent to the Mac operating system instead of your virtual machine.
Examples of global Mac keyboard shortcuts include Command-Tab (switch applications) and F9, F10, and F11 (Exposé commands). You set these shortcuts and commands in the macOS System Preferences.
You can use the Mac Host Shortcuts pane to disable all these shortcuts while you use Fusion. This action applies only to Single Window view and Full Screen view. In Unity view, all macOS shortcuts are always enabled.