My setup consists of Mac OS X system that runs RealVNC client to connect to Ubuntu Server machine that is a KVM host via VNC.
When working in guest VM graphical console (as opposed to text console which usually requires additional configuration of guest VM) you may end up clicking into the black area.
That would grab your mouse pointer.
Actually, you don’t have to click VM screen area if all you want to do is type in something but 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 didn’t work on Mac.
Instead you need to use:
which has the same effect.
PS: interestingly it is one of the top blog posts on this blog. I guess way too many people run into this problem? If you’re one of them let me know in the comments section down below.