macOS High Sierra (10.13.6) on Virtualbox on Acer V5-571G - resolve the resolution by using this command

In Lubuntu , you just need to enter this command directly VBoxManage setextradata “Your VM name” VBoxInternal2/EfiGopMode 4

Reference:

https://www.wikigain.com/fix-macos-sierra-screen-resolution-virtualbox/