All I get is a black screen with the mouse

[mechainical]

Hey all,

New to Livestream, but when I am making a recording of my desktop, all I get is a blank screen on the preview, but I can see the mouse highlighted moving around.

When I go to the recording in my video files, it has only recorded the blank screen and the mouse moving around.

Any ideas?

MacBook Pro
2.4 GHz Intel Core i7
8gb 1333 MHz DDR3

Thanks