My setup consists of Mac OS X system that runs RealVNC client to connect to Ubuntu Server machine, a KVM host, via VNC.
When working in a guest VM console over VNC you may end up clicking into the black area. Which grabs and locks your mouse pointer.
Actually, you don’t have to click the VM console screen area, if all you want to do is type in something. However, if you must use mouse to click something inside the terminal view it’s going to get locked.
To release your mouse pointer, normally you’d press Ctrl_L+Alt_L, as it is stated in the window title.
However, it doesn’t work on Mac. Instead you need to use:
PS: Interestingly, it is one of the top posts on this blog. I find it ironic. Apparently, way too many people run into this problem. If you’re one of them let me know in the comments section down below.