Security warnings will appear due to the Catalina security enhancements, you have to open the app manually. I find VMware Player very limiting in its VM config options. Also every unlocker I have downloaded has set off my antivirus.
I am looking for an unlocker for Player 16. Fixing VMware Fusion Black Screen on Catalina. Fusion Player und Fusion Pro können sowohl Container als auch Kubernetes. von gängigen Produktivitäts-Suites (wie Microsoft Office) bis zu grafikintensiven Programmen wie AutoCAD oder SolidWorks, die DirextX 11 erfordern, und auch individuelle Anwendungen. Nahezu alle Programme, die auf diesen Betriebssystemen laufen, können mit VMware Fusion ausgeführt werden. Mit VMware Fusion können Sie macOS, Windows, Linux und andere x86-basierte Betriebssysteme als virtuelle Maschinen ausführen.
If you have to test and try a VM create a temporary one How to Install macOS Catalina 10 When the VMware Fusion pop-up, click on the corner on + icon, then click on New - uninstall VMware Fusion - install VMware Fusion 11.1.1 - make sure you get Fusion listed in the security pane - do _not_ start a VM you want to use on your older VMware Fusion as by default it will upgrade its virtual hardware to a newer version and you will have to downgrade it again manually. Creating a new virtual machine is pretty easy, open the VMware Fusion and follow the below picture guides if you don't know. When the VMware Fusion installed then go-ahead to create a new virtual machine for macOS Catalina on macOS.