I have a MacBook Pro and I am looking for a way to run another OS X Yosemite inside it.
I tried Virtual Box, and installed OS X, but it doesn't support guest additions for OS X guests. It keeps the display at 1024x768 and the mouse moves very slowly.
What is the best way to run OS X inside another OS X? Note that I have a legal OS X and I am not talking about Hackintosh!
VBoxManage setextradata "VM name" VBoxInternal2/EfiGopMode N
where N can be one of 0,1,2,3,4,5 referring to the 640x480, 800x600, 1024x768, 1280x1024, 1440x900, 1920x1200