NOTE: The best performance using an eGPU device can be achieved when it's connected to an external display. Move the VM window to the primary display.If your virtual machine is already running, suspend it via Actions menu > Suspend but make sure to quit applications that use graphics. macOS will re-arrange opened applications' windows.To make a different display your primary display, drag the white bar to the box that represents that display. The white bar at the top of the blue box identifies your primary display.Make the display that is connected to eGPU device your primary display: go to macOS System Preferences > Displays > Arrangement.With macOS High Sierra, Parallels Desktop uses the graphics of a primary Mac display. Using an eGPU device and the built-in display could nullify all performance benefits because the procedure of transferring the picture from eGPU to the built-in display is highly resource-consuming. Now the virtual machine will use eGPU device.Start Parallels Desktop and move the VM window to the desired display.Right-click on it > Get Info and also enable 'Prefer External GPU'.Locate the app file inside the package.Right-click on it > Show Package Contents.Enable the option 'Prefer External GPU':.Open Finder > Applications > right-click on Parallels Desktop.app > Get Info.If your virtual machine is already running, suspend it via Actions menu > Suspend, but make sure to quit applications that use graphics, then quit Parallels Desktop.However if you eGPU has a built-in charging mechanism (it can also charge the computer), in this case it is not needed for the Mac to be connected to the power adapter. NOTE: eGPU device works when Mac connected to power adapter. Follow the instructions below to get it work.

Once your eGPU device works fine in macOS, Parallels Desktop will use the available graphics resources to increase virtual machine video performance. Informationįirst, make sure you have connected eGPU device correctly: plug eGPU device to Mac via Thunderbolt and connect your display directly to eGPU. I have an external graphics processor (eGPU) device, such as Apple External Graphics Development Kit, and I would like to use it in a Parallels virtual machine (VM).

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