Virtualbox 5.2.2: OSX 10.12.6 guest resolution issue on Win10

[amr]

vboxmanage setextradata "Sierra" VBoxInternal2/EfiGraphicsResolution 1920x1080

is not working anymore!

guest resolution not changed.

vboxmanage getextradata "Sierra" enumerate

Key: GUI/LastCloseAction, Value: SaveState

Key: GUI/LastNormalWindowPosition, Value: 0,38,1914,1003

Key: GUI/LastNormalWindowPosition1, Value: 640,281,640,480

Key: GUI/LastScaleWindowPosition, Value: 441,187,1143,673,max

Key: GUI/LastScaleWindowPosition1, Value: 640,281,640,480

Key: GUI/RestrictedRuntimeDevicesMenuActions, Value: HardDrives

Key: GUI/RestrictedRuntimeMachineMenuActions, Value: SaveState,PowerOff

Key: GUI/Scale, Value: true

Key: GUI/ScaleFactor, Value: 1

Key: GUI/StatusBar/IndicatorOrder, Value: HardDisks,OpticalDisks,FloppyDisks,Network,USB,SharedFolders,Display,VideoCapture,Features,Mouse,Keyboard

Key: VBoxInternal/Devices/efi/0/Config/DmiBoardProduct, Value: Iloveapple

Key: VBoxInternal/Devices/efi/0/Config/DmiSystemProduct, Value: iMac11,3

Key: VBoxInternal/Devices/efi/0/Config/DmiSystemVersion, Value: 1.0

Key: VBoxInternal/Devices/smc/0/Config/DeviceKey, Value: * censored *(c)AppleComputerInc

Key: VBoxInternal/Devices/smc/0/Config/GetKeyFromRealSMC, Value: 1

Key: VBoxInternal2/EfiGopMode, Value: 5

Key: VBoxInternal2/EfiGraphicsResolution, Value: 1920x1080

[Socratis]

Replying to amr:

Key: VBoxInternal/Devices/smc/0/Config/DeviceKey, Value: ourhardworkbythesewordsguardedpleasedontsteal(c)AppleComputerInc

I "separated" the smc key words to make it easier for you to read.

You do not have an OSX Host, you have a Windows Host, and unfortunately OSX guests are only supported on Apple hardware (which you do not have). See: ​"Mac OS X guest on a Windows Host".