

This blog is a quick fix to this problem. The default value of video memory varies by guest OS.If you are using Mac and running Linux virtual machines on virtual box, you might have experienced slowness and lags compared to using VMWare Fusion. (Optional) Select the maximum amount of guest memory that can be used for graphics memory using the drop-down menu.

Select a resolution from the list or type a setting that has the format width x height, where width and height are the number of pixels. After you power on the virtual machine, the guest operating system sees the number of monitors that you specified. It is also useful if you are developing a multimonitor application in a virtual machine and the host system has only one monitor. This setting is useful if you use a multimonitor host system and you need to test in a virtual machine that has only one monitor. Set the number of monitors that the virtual machine will see, regardless of the number of monitors on the host system. You should select this setting in most cases. The guest monitors cannot exceed the maximum bounding box that the SVGA driver uses, 7680x4320. The virtual machine uses the number of monitors on the host system.

When you select this setting, the SVGA driver uses a maximum bounding box width of 7680 and a maximum bounding box height of 4320. Specify whether host settings determine the number of monitors.(Optional) To run applications that use DirectX 9, DirectX 10, DirectX 10.1 or DirectX 11 accelerated graphics, select Accelerate 3D graphics.Select the virtual machine and select Player > Manage > Virtual Machine Settings.
