The End User License Agreement (EULA) for Apple Mac OS X legally and explicitly binds the installation and running of the operating system to Apple-labeled computers only.
According to Apple's licensing policies, VMware only supports the virtualization of Apple Mac OS X 10.10 (Yosemite) client or server, Apple Mac OS X 10.11 (El Capitan) client or server, Mac OS X 10.9 (Mavericks) client or server, Mac OS X 10.8 (Mountain Lion) client or server, Mac OS X 10.7 (Lion) client or server, 10.6 (Snow Leopard) server and 10.5 (Leopard) server.