When you first launch Fusion 8 on Catalina, you will likely see a pop-up stating: "System Extension Blocked."
Simply drag the Fusion 8 application to the Trash before installing the newer version. Running Catalina as a Guest OS vmware fusion 8 catalina
When you mount the VMware-Fusion-8.5.10...dmg , don't drag the app to the folder yet. Instead, right-click the Install VMware Fusion.pkg and select . If you double-click, it will block you. When you first launch Fusion 8 on Catalina,
This is due to a code signature mismatch. Run this in Terminal: vmware fusion 8 catalina