I wanted to reactivate my old Mac Mini (from 2007, OS X Lion 10.7.5) to use it for some server testing stuff.
As I don't want to add another monitor, keyboard and mouse to my desktop, I want to control the Mac via VNC, like I already did it years ago.
So I enabled screen sharing and connected to the Mac with my Windows 8 PC (RealVNC). That works fine, as long as I have a screen connected to the Mac. As soon as I disconnect the screen, all windows disappear and I only have the top and bottom bar. I can start every program, but it won't show any window. I can see popup windows (like the confirmation when I want to reboot) at the bottom left of the screen, but only the top of the popup. I can drag it in the middle, but if I let got of the mouse button, it jumps back out of sight again.
I've already searched the internet, but only found old entries that said, that it is fixed with newer versions of VNC.
Any help or alternatives?