You cannot use a Mac OS X, OS X, or macOS virtual machine in another VMware product, such as Workstation Pro. Fusion does not change these terms or enable macOS on non-Apple hardware.
However, whenever you are going to install macOS operating system on VMware workstation so, the VMware Workstation doesn’t have the MacOS option to select that, in this case, you need to install unlocker in order to appear macOS Version on the list of the operating system on VMware Workstation.