One of the great things about Lion was the Virtual Display, whereby when screen sharing you could login as a 2nd user rather than just take over the physical display.
In effect it was like turning your Mac into a (limited) multi user system, whereby 2 people could simultaneously login and use it.
When using the Screen Sharing feature in Mountain Lion (to research whether there were any changes that might answer this question), I noticed it has seemingly been removed.
Is there any official documentation showing it's removal, or is it still possible to achieve perhaps through other utilities, like Apple Remote Desktop?
I should add that I am using ML at both ends of the screen sharing.
Best Answer
OK, I sussed it out. You can still do it, it's just that the way you do it is based on context rather than using the appropriate command.
Basically, to use the virtual display, you need multiple user accounts on the target machine, and you need an account to be already logged into the target machine such that you can login a 2nd time using the virtual display. Any account you wish to log into obviously needs the associated sharing rights enabled. Then follow the following logic:
If you want to use the virtual display for privacy reasons, you cannot simply switch to it like you could in 10.7, but you could simply leave the target machine with Guest logged in on the Hardware display to allow you to login as your primary user on the Virtual one.