VNC Viewer with Username? - Super User
https://superuser.com/questions/228758This answer is useful. 4. This answer is not useful. Show activity on this post. When I have setup VNC to access a Mac (a couple of times), you just had to define an access password for the client and this got you to whatever screen was active for the current user on the Mac, so no username was needed? Happy to be corrected by Mac experts.