Changing Screen Resolution of Mac OS VirtualBox Guest

Published: Jul 10, 2020 by Patap

The default screen resolution for Mac OS X VirtualBox Guest is 1024×768.
Below shows how to change the screen resolution of Mac OS VirtualBox guest running on Windows 10.

Steps:

  1. Open “Command Prompt”. (press Win + x and select “Command Prompt”)
  2. Navigate to VirtualBox folder in which “VBoxManage.exe” resides.

cd C: \ Program Files \ Oracle \ VirtualBox

  1. Set resolution by typing the command below.

VBoxManage setextradata "catalina2019" VBoxInternal2 / EfiGraphicsResolution 1440x900
The third parameter (i.e. “catalina2019”) should be your VM name.

  1. Start the VM