OpenGL 1.5 / DirectX 8.1 Support--Run supported games and 3D applications at native speed in Windows. Open documents in Mac OS or Windows using any available Mac OS or Windows application. Windows Start Menu Integration--Click the Parallels icon in the Dock to show the Windows Start Menu. Run Windows and Mac OS applications in a single integrated environment, or mount Your Windows File System and access its files and folders directly from Mac OS. Support for OS X Leopard--Full support for Apple's next generation operating system when it ships. Run Windows and Mac OS applications in a single integrated environment,. Or mount Your Windows File System and access its files and folders directly from Mac OS. Support for OS X Leopard--Full support for Apple's next generation operating system when it ships. Open documents in Mac OS or Windows using any available Mac OS or Windows application. OpenGL 1.5 / DirectX 8.1 Support--Run supported games and 3D applications at native speed in Windows. Windows Start Menu Integration--Click the Parallels icon in the Dock to show the Windows Start Menu.