Start up VirtualBox, load up your virtual machine, and it should boot to your preferred resolution! If the command did not work, make sure your virtual machine is named “High Sierra” exactly if it isn’t, edit the commands above putting your machine’s name in the quotes. That’s it! If everything worked, you shouldn’t see any feedback the commands will simply run. Cd 'C:Program FilesOracleVirtualBox' VBoxManage.exe modifyvm 'High Sierra' -cpuidset 00000001 000306a9 04100800 7fbae3ff bfebfbff VBoxManage setextradata 'High Sierra' 'VBoxInternal/Devices/efi/0/Config/DmiSystemProduct' 'MacBookPro11,3' VBoxManage setextradata 'High Sierra' 'VBoxInternal/Devices/efi/0/Config/DmiSystemVersion' '1.0' VBoxManage setextradata 'High Sierra' 'VBoxInternal/Devices/efi/0/Config/DmiBoardProduct' 'Mac-2BD1B31983FE1663' VBoxManage setextradata 'High Sierra' 'VBoxInternal/Devices/smc/0/Config/DeviceKey' 'ourhardworkbythesewordsguardedpleasedontsteal(c)AppleComputerInc' VBoxManage setextradata 'High Sierra' 'VBoxInternal/Devices/smc/0/Config/GetKeyFromRealSMC' 1

Mac os virtual machine windows 10